The Lebanese army said its troops killed six jihadists and arrested 16 others near the Syrian border on Wednesday, in its largest operation against ISIS.

The soldiers launched the raid, in which local ISIS chief Anas Zaarour was killed, at dawn in the Arsal region of eastern Lebanon, a military spokesman said.

A "most wanted" militant, Ahmad Noun, was among those arrested.

"It was our largest operation against Daesh... in terms of size and the number of people killed and captured," the spokesman told AFP, using an Arabic acronym for ISIS.