The situation is clearly dangerous and we call on all sides to show restraint and avoid violence, foreign secretary william hague said.
The united kingdom does not support military intervention as a way to resolve disputes in a democratic system.
Mr Hague called for early elections in which all parties could take part and for a civilian-led government.
A Canadian foreign ministry spokesman called for calm,dialogue and a return to democracy.
But Saudi King Abdullah on Wednesday praised the army's intervention and congratulated the new caretaker president Adly Mahmud Mansour.