India’s federal anti-terror agency will interrogate a Ukrainian and an American who were arrested in March for allegedly entering the country’s restricted areas without permits, and crossing over into neighboring Myanmar to provide training to armed groups.

A Delhi court on Monday allowed the National Investigation Agency (NIA) to interrogate Ukrainian Viktor Kaminskyi and American Matthew VanDyke on September 2 and 3.

Both men are currently in Delhi’s Tihar jail. The two, along with five other Ukrainians – Petro Hurba, Taras Slyviak, Ivan Sukmanovskyi, Marian Stefankiv, and Maksim Honcharuk – were arrested from three different cities while trying to fly out of the country.

It is not immediately clear why the NIA is interrogating only two from the group. The agency earlier recorded voice samples of all the arrested individuals.

Soon after their arrest, Ukraine rejected “any insinuations regarding the possible involvement of the Ukrainian State in supporting terrorist activities” and demanded that India release its nationals.

The NIA earlier reportedly found evidence that multiple consignments of drones from Europe were delivered by the accused to individuals and groups in the northeastern Indian state of Mizoram, where they crossed into Myanmar.

Myanmar insurgent groups are reportedly linked to rebel outfits in India’s northeast region – drawing the attention of Indian agencies to the group’s activities.

VanDyke is the founder of Sons of Liberty International, which provides military training in conflict zones. He has reportedly been involved in conflicts in the past, including fighting with Libyan rebels in 2011.

His family and lawyers said on Sunday that a Delhi court rejected their request – citing his deteriorating health – to allow him treatment at a private hospital, and to communicate with his family in the US. In July, the court allowed him special food items and a cook after he complained that the “spicy and oily” prison meals affected his health.

The family said the US ambassador to India, Sergio Gor, briefed Indian Foreign Secretary Vikram Misri and US Secretary of State Marco Rubio about Van Dyke in May.

In a statement posted on X, Sons of Liberty demanded “urgent US diplomatic intervention” to bring VanDyke home.