Soldiers on Tuesday evening arrested six students from Dagon University who were staying together in an apartment in downtown Yangon, a student leader has said.

Min Htet Han, chair of the university’s students’ union, told Myanmar Now it is unclear why the six were arrested, but that soldiers arrived at the 39th street apartment in Kyauktada saying they were inspecting overnight guest lists.

“They were staying on the top floor and it was the only apartment that was checked,” he said. “I think it’s safe to assume that they were looking for them in particular.” Informants may have told the military they were staying there, he suggested.

The six detainees are zoology student Wutyi Aung, chemistry student Thinzat Zaw, law student Sithu Aung Tin, archeology student Ye Lin Oo, geology student Myint Thein Naing, and Nay Htet Lin, who studies history.

Earlier this month the former chair of the Dagon University Students’ Union, Min Thukha Kyaw, was sentenced to 10 years in prison by a military court. He had taken part in anti-coup protests before his arrest more than three months ago. The military accused him of receiving combat training from the Kachin Independence Army.

Students have been among the most dedicated opponents of the military’s February 1 power grab, and have been repeatedly targeted in crackdowns in recent months.

Htet Aung, the 22-year-old former president of the Pyay University Students’ Union and vice president of the All Burma Federation of Student Unions (ABFSU), was arrested by 10 plain clothed military personnel at a house in Paungde Township, Bago Region, where he was hiding on September 6.

“They took him saying they had some questions. We don’t know exactly why he was arrested,” said Nyi Nyi Zin, an ABFSU member.

Htet Aung had only been released from prison in February after serving several months of a one-year sentence for taking part in a protest against the war in Rakhine last year.

His family say they are worried for his wellbeing and do not know where he is being held.

In July, the junta detained nine students including Htet Wai Yan, the president of the Government Technical Institute Students’ Union in Letpadan, as well as Yan Naing Aung, an executive member of the Pyay Students’ Union.

Zin Ko Ko Khant, a 20-year-old student from Taungoo University, was detained a few days later.