The United States and the United Kingdom said on Wednesday they suspended the non-lethal assistance into northern Syria after extremist militants seized armed depots belonging to the foreign-backed opposition “Free Syrian Army.”

The United States and the United Kingdom said on Wednesday they suspended the non-lethal assistance into northern Syria after extremist militants seized armed depots belonging to the foreign-backed opposition “Free Syrian Army.”

US embassy spokesman T.J. Grubisha announced the move, saying: "Because of the current situation the United States has suspended deliveries of non-lethal assistance into northern Syria.”

But he added that the US move would not impact on humanitarian aid which was coordinated by international and nongovernmental organizations.

Britain's Foreign Office says it is suspending delivery of non-lethal aid to Syria's opposition.

Britain's Foreign Office said it is investigating those incidents and that it "will not be making any deliveries of equipment" to the Free Syrian Army while that investigation is under way.

It said it intends to resume assistance as soon as conditions on the ground allow for the "safe delivery" of equipment provided.

Extremists seized the depots belonging to the Western-backed FSA near the Bab el-Hawa border crossing with Turkey on Saturday.

The seizure came after they announced that it rejected the authority of the FSA command.