Three people were killed in Yemen's capital, Sanaa, when a drone crashed into a neighborhood, after it was shot down.

Anti-government forces that control the capital said their air defenses shot down an armed drone belonging to Saudi Arabia's air force on Monday night. They said three passersby died after being struck by the downed aircraft.

The drone crashed into a busy area that contains a shopping mall and other facilities. Footage from the scene shows what appears to be pieces of a wrecked drone scattered around.

The incident took place amid a truce between the Saudi-backed government and the anti-government forces. The two sides have been engaged in a civil war for more than seven years. The two-month-long ceasefire is due to expire on June 2.

A spokesman for the anti-government forces accused Saudi Arabia of violating the truce and carrying out hostile acts in the capital's airspace.

Saudi Arabia has yet to issue a statement about the incident.

The United Nations has been urging the two sides to extend the truce. Observers say this latest incident could affect negotiations aimed at extending it.