(BBC) — Turkey has said it will challenge Israel’s blockade of Gaza at the International Court of Justice (ICJ).

It is the latest sign of strain between the countries since last year’s Israeli action against ships heading for Gaza, in which nine Turks were killed.

Foreign Minister Ahmet Davutoglu said Turkey did not accept the findings of a UN report which said Israel’s blockade of Gaza was a legal security measure.

His comments came a day after Turkey expelled the Israeli ambassador.

It also halted military co-operation with Israel.

Based in The Hague, the ICJ is a permanent UN court set up to rule on state-to-state disputes.

Israeli Deputy Foreign Minister Danny Ayalon insisted his country had nothing to apologise for and had done all it could to avoid a crisis with Turkey.