File picture - Free Syrian Army fighters patrol a street in Qusair town near Homs city in northern Syria.

At least 43 people were killed in violence across Syria Tuesday, including 20 gunned down by regime forces while attending the funeral of a man killed the previous day, a monitoring group said.

The Syrian Observatory for Human Rights said the mourners died in Khan Sheikhun, a town in the northwest province of Idlib, while the remaining 23 victims died in unrest elsewhere across the country. - Sapa-AFP