The HTS soldiers were allegedly targeting a former Assad soldier who worked at Sednaya prison.
State media said the curfew was being imposed for one night, from 6pm local time until 8am on Thursday morning.
HTS leader Ahmed al-Sharaa has been meeting with several Syrian rebel groups in an effort to work out any disputes between warring factions.
Israel advances to protect its borders with Syria, and Trump calls Turkey a "key player in shaping the post-Assad political landscape."
Whether Julani sees himself as a more moderate version of Assad or as the political head of a democratically elected, representative government is the question.
Asma al-Assad moved to Syria in 2000 and married Assad in the same year at the age of 25.
Has he really changed, or is Julani a clever politician who knows how to direct the right message to his target audiences?