Turkey urged the UN Security Council to take the "necessary action" to stop Syrian aggression after a mortar bomb fired from Syria killed five Turkish civilians.
A letter obtained by Reuters said:
This is an act of aggression by Syria against Turkey. It constitutes a flagrant violation of international law as well as a breach of international peace and security.
More top news
Hundreds of people scaled 20ft-high border fences to enter the tiny enclave of Ceuta from Morocco hoping to reach a better life in Europe.
Women may not be taking a common breast cancer drug due to the mistaken belief it causes nausea and vomiting, research suggests.
The two brothers were aged 10 and 11 when they tortured two boys in Edlington, south Yorkshire, in 2009 in a case that shocked Britain.