No group has yet said it was behind Friday's shooting attack in the village of Hmoud, which left nine Christians dead.
The sailors received medical treatment before being flown back to Iran, Sri Lankan authorities said.
After three years of regional war, this is a battle Israel always knew was coming, writes Lucy Williamson.
Security and democracy emerge as central issues in Israel's highly anticipated general election, as Middle East correspondent Lucy Williamson reports.
Israel heads to the polls on Tuesday for what many view as one of the most pivotal elections in the country's history.
The Israeli Defense Forces announces restrictions on the movement of Palestinian workers in the run-up to Tuesday's election.
The ultra-Orthodox community is resisting being drafted into the Israeli army. But will they now bring down the Netanyahu government?
The crackdown follows the killing of two Israeli soldiers by two Palestinian gunmen on Friday - and comes just days ahead of Israel's election.
The warning comes as the US State Department makes adjustments to staffing at diplomatic posts in the region.
Thirty-four people are also injured in the attack in southern Karak governorate, and a manhunt is now under way.
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