MOSCOW - Russia expressed deep concern on Wednesday over an attack that killed the US ambassador to Libya and said it considers all attacks on diplomats to be "manifestations of terrorism".

"Moscow views the events in Cairo and particularly in Benghazi, which led to the tragic deaths of four American diplomats, with deep concern," the Russian Foreign Ministry said in a statement.

"We decisively condemn all attacks on foreign diplomatic representations and their employees as manifestations of terrorism that can have no justification," it said.

Please LIKE our Facebook page - it makes us stronger