Six teenagers from Burundi taking part in a robotics competition in the US have been reported missing, police say.
Four boys and two girls – aged from 16 to 18 – disappeared during the First Global Challenge tournament in Washington DC.
The DC Police Department says they were last seen on Tuesday – on the closing day of the competition.
Reports say two of the teenagers have since crossed into Canada but this has not been confirmed by the police.
On Thursday, the DC Police Department posted fliers of the missing group on its Twitter page, asking members of the public to get in touch if they had any information.
The teenagers were identified as Don Ingabire, 16, Kevin Sabumukiza, 17, Nice Munezero, 17, Audrey Mwamikazi, 17, Richard Irakoze, 18, and Aristide Irambona, 18.
Competition organisers say they alerted police after Burundi’s team supervisor was unable to find the teenagers.