The missing Air Algerie aircraft took off from Burkina Faso at 01:17 local time (02:17am BST) and was supposed to land in Algiers at 05:10 local time (05:10am BST) but never reached its destination, Swiftair says.
Algeria's APS state news agency says the flight lost contact around 50 minutes in to its journey.
More top news
Researchers in Boston have created a 'robot cheetah' that they hope will be able to reach top speeds of 30mph.
UK trials of a vaccine for the Ebola virus began today - but some experts complain that the response has been a long time coming.
This September has been the driest so far for more than 50 years, Met Office figures have revealed.