Pakistan has ordered the charity Save the Children to leave the country, with an official accusing the NGO of "anti-Pakistan" activities.mPolice have sealed off their offices in Islamabad and foreign staff given 15 days to leave the country. Save the Children said it "strongly objected" to the action. Pakistan has previously linked the charity to the fake vaccination programme used by the CIA to track down Osama Bin Laden. The charity has always denied being involved with the CIA or Pakistani doctor Shakil Afridi, who carried out the programme. The charity has had no foreign staff in the country for the past 18 months in response to the accusations. It now has 1,200 Pakistani staff working on projects in health, education and food. Speaking after the charity was shut, Pakistan Interior Minister Chaudry Nisar Ali Khan said that NGO's were operating beyond their remit with backing from US, Israel and India. "Local NGOs that use foreign help and foreign funding to implement a foreign agenda in Pakistan should be scared. We will not allow them to work here whatever connections they enjoy, regardless of the outcry," he said in a live television broadcast. Save the Children, which has operations all over the world, has worked in Pakistan for more than 30 years. No government explanation The Pakistani government has not given a formal announcement explaining the decision. But one official told the AFP news agency: "Their activities were being monitored since a long time. They were doing something which was against Pakistan's interest." A police official said that the charity's phone calls and offices had been placed under surveillance. Speaking to the Reuters news agency, he added that the charity's activities were "very suspicious". Condemning the move, Save the Children said it was "raising our serious concerns at the highest levels", adding that its workers were all Pakistani nationals. A Save the Children official told Reuters that the Pakistan government had been stopping aid shipments entering the country, "blocking aid to millions of children and their families". It comes after the Pakistani government announced it was tightening the rules for NGOs, revoking several of their licences. The BBC understands that one of those NGO's, the Norwegian Refugee Council, has ceased all operations in Pakistan as its licence has not yet been renewed. UPDATE 14/06/2015 Pakistan has suspended moves to close the national branch of the charity Save the Children. The move by the interior ministry comes days after the charity's main office in the capital Islamabad was shut down by police. No formal reason was given for the action and there has been no official comment on the reversal. Officials have previously accused the charity of involvement in "anti-state activities". Pakistan had linked the charity to a fake vaccination programme used by the CIA to track down Osama Bin Laden. Save the Children has always denied being involved with the CIA or Pakistani doctor Shakil Afridi, who carried out the programme. 'Foreign funding' A Save the Children spokesperson told the BBC on Sunday that the charity welcomed the government's decision. About 1,200 Pakistanis work for Save the Children, but no foreign staff have been in the country for the past 18 months. Speaking after the charity's offices were shut last Thursday, Pakistan Interior Minister Chaudry Nisar Ali Khan said NGOs were operating beyond their remit with backing from US, Israel and India. He said local NGOs that used foreign funding to implement a foreign agenda in Pakistan "should be scared". Save the Children said at the time it "strongly objected" to the closure and it was "raising serious concerns at the highest levels". The US State Department also expressed concern over the closure. UPDATE: 26/ 06/ 2015 Pakistan unseals Save the Children Offices Save the Children said Wednesday its office in Islamabad had been unsealed but it would take time to resume operations across Pakistan after a crackdown on foreign aid agencies by authorities. "The city administration unsealed our office in Islamabad today but it will take some time to completely resume our operations across the country," Saeed Ahmed, a spokesperson in Islamabad for the British-based charity, told AFP. The government sealed Save the Children's offices earlier this month, saying the charity was "working against the country", and threatened to expel more foreign aid groups for supposedly undermining Pakistan. Read: "Uncharitable' affairs: Save the Children office sealed in Islamabad "Save the Children welcomes the decision of Government of Pakistan to reopen its offices and operations in the country, and for publicly recognising that Save the Children is a credible organisation and has never been involved in any anti-state activities," the charity said in a statement. Pakistan has toughened its policies towards international aid groups in recent years, accusing them of acting as cover for spying operations. In 2012 the government expelled the expatriate staff of British-based Save the Children, which has worked in Pakistan for over 35 years and employs 1,200 Pakistanis. Read: Save the Children allowed to resume operations in Pakistan That move came after Pakistani intelligence services accused the charity of links to doctor Shakeel Afridi, who was hired by the CIA to carry out a vaccination programme as part of the search for al Qaeda chief Osama bin Laden. Save the Children has always vehemently denied any link to either Afridi or the CIA.