Ukraine’s foreign affairs ministry says that four of its citizens were among those captured by al-Qaida-linked extremists in Somalia after their helicopter that was contracted by the United Nations made an emergency landing in territory controlled by the militants earlier this week.

NAIROBI, Kenya (AP) — Ukraine’s foreign affairs ministry says that four of its citizens were among those captured by al-Qaida-linked extremists in Somalia after their helicopter that was contracted by the United Nations made an emergency landing in territory controlled by the militants earlier this week.

Officials say the helicopter went down on Wednesday because of engine failure and was then attacked by al-Shabab militants who killed one person and abducted the other passengers.

“Our citizens were members of the helicopter crew of the United Nations Mission in Somalia that crashed,” said Oleh Nikolenko, spokesman for the Ukrainian foreign affairs ministry said Friday in a Facebook post.