Cairo airport authorities tightened security on Tuesday after finding two bombs near the arrivals hall and a homemade explosive device exploded in central Cairo, security officials said.
The target of the blast near a busy square in downtown Cairo was not immediately clear. Two people were lightly wounded, security sources said.
The bombs at the airport were detected with electronic devices early on Tuesday. Airport security officials were reviewing video footage to try and determine who planted the bombs, security sources said.
Islamist militants seeking to topple the government have carried out numerous bomb attacks on soldiers and police since the army toppled President Mohamed Mursi of the Muslim Brotherhood in July of 2013.