Photos: 21 killed in Tunisia museum shooting

Tunisian state television says the death toll in an attack on a prominent museum has risen to 21, including several foreign tourists and two gunmen, according to ABC News.

Authorities say assailants opened fire on the National Bordo Museum on Wednesday, killing tourists and a cleaning woman and wounding several others. Security forces later stormed the museum, killing two gunmen and a security officer. At least two or three other accomplices may be at large.

State television said Wednesday afternoon that the death toll had risen to 22 people, including the two attackers. The report, citing medical officials, did not give a breakdown of nationalities.

World leaders offered their support to Tunisia's government. The prime minister promised extra security in tourist zones and asked residents to be extra alert.

The Associated Press contributed to this report.