Sixteen Kenyans are missing in Russia after joining the country's army, Kenya's foreign affairs minister has said, while 47 others have returned home from the front lines in Ukraine.

Thirty-eight others are currently in different Russian hospitals under restricted access, Musalia Mudavadi told a Senate committee meeting.

He added that the number of missing Kenyans had risen from 10 to 16 within the last 24 hours. It remains unclear whether they are dead or alive.

The minister also estimated that 165 Kenyans are actively involved in military operations, bringing the total number who have participated in the conflict in Ukraine to more than 250.

Mudavadi said the total number could be higher. He added that two Kenyans are being held by Ukraine as prisoners of war.