The Israel Defense Forces (IDF) released the names Thursday of two reservists killed in an explosion in southern Lebanon. 

Maj. Harel Birenstock, 34, of Nokdim, and Master Sgt. (Res.) Tamir Vaknin, 33, of Eilat died in the blast. Four other soldiers were injured in the explosion. 

Funerals for Birenstock and Vaknin are scheduled to take place Thursday. 

The blast occurred while Israeli forces were searching a booby-trapped building in the village of Majdal Zoun in southern Lebanon. 

An in-depth investigation into the incident has been opened, according to the IDF.  Among the questions under review is whether the explosive device had been emplaced before the ceasefire or planted afterward. Military investigators are also examining the possibility that Hezbollah operatives remotely detonated the device after spotting Israeli soldiers operating at the site. 

Following the incident, Israel accused Hezbollah of committing a blatant violation of the ceasefire and launched strikes across the surrounding area. 

The deaths came as Israel and Lebanon continue indirect negotiations aimed at advancing a June framework agreement. The two sides are holding their seventh round of US-brokered talks in Rome.