Jerusalem ? The Israeli navy intercepted a ship carrying humanitarian supplies from Lebanon to the Gaza Strip and towed the vessel into port Thursday, foiling a new attempt by international activists to break Israel’s blockade of the Palestinian territory.

It was the first time Israeli forces seized an aid ship, after the navy let some boats in and turned others around.

The interception was condemned by Lebanon and Syria, adding to regional tensions in the wake of last month’s devastating Israeli offensive against the Islamic militants of Hamas who control Gaza.

Talks in Egypt to cement a long-term cease-fire in Gaza ran into obstacles Thursday. A Hamas delegation left Cairo without agreeing to a truce deal.