New Delhi, May 23 -- A group of Hezbollah-affiliated parliamentarians, state security officials, and allies of the militant group were hit with U.S. sanctions Thursday, for allegedly seeking to preserve the Iran-backed group's influence over Lebanese state institutions and obstruct disarmament efforts.

It's the first time Washington has sanctioned sitting Lebanese state security officials, one from the country's General Security agency and the other from the military intelligence, both of them accused of providing Hezbollah with "illicit support" and intelligence during the ongoing conflict.

The announcement comes as pressure mounts on Beirut to take more decisive action in disarming the group.

Included in Thursday's sanctions are form...