Tunis placed under curfew after bus bomb attack - president

A Tunisian police officer is pictured after an atack on a military bus in Tunis, Tunisia November 24, 2015. REUTERS/Zoubeir Souissi

TUNIS (Reuters) - Tunisian authorities are placing the capital Tunis under curfew until 5 a.m. (0400 GMT) on Wednesday after a bomb attack on a presidential guard bus killed at least 12 people, President Beji Caid Essebsi said on Tuesday. (Reporting by Tarek Amara; writing by Patrick Markey)