Tunisia's top security official says 1,000 extra police are being deployed at tourist sites and beaches in the North African nation.

Interior Minister Mohamed Najem Gharsalli made the announcement late Saturday. He said "we don't want to make tourist establishments into barracks, that's not our goal. But we must act to guarantee the security of the tourist sector."

Thousands of tourists fled Tunisia on Saturday after the country's worst terrorist attack killed 38 people. Hundreds more were to leave Sunday.

The Friday attack on tourists at a beach is expected to be a huge blow to Tunisia's tourism sector, which made up nearly 15 percent of the country's gross domestic product in 2014. It also comes after 22 people were killed in March at the National Bardo Museum in Tunis.