Hermel municipality has imposed a 24-hour curfew on Syrians ahead of Tuesday's Ashura processions.
The curfew starts at 5 p.m. Monday in the northeastern district, the municipality announced.
Shias will gather in city squares Tuesday to commemorate Ashura, the martyrdom of Imam Hussein, a grandson of the prophet Mohammad, at the Battle of Karbala in the year 680.
The decision was made during a tense situation in Lebanon where the hunt for Islamist militants, many of them Syrians, is ongoing.
Tensions were exacerbated after last week's deadly four-day battle between the Army and militants in Tripoli and other parts of the north.
On Sunday, explosives were discovered near Hezbollah’s Sayyed al-Shuhada complex in the southern town of Haret Saida.
The complex hosts daily events to mark Ashura.
