UN experts in international law have condemned the killing of Hamas deputy leader Saleh al-Arouri and other fighters in drone strikes on Lebanon, saying this amounted to the crimes of extrajudicial killings and murder, Reuters reports.

“Killings in foreign territory are arbitrary when they are not authorised under international law,” the two UN Special Rapporteurs, Ben Saul and Morris Tidball-Binz, said in a statement issued in Geneva.

“Israel was not exercising self-defence because it presented no evidence that the victims were committing an armed attack on Israel from Lebanese territory.”

The U.N. Special Rapporteurs also said there was “no legal basis for geographically unlimited attacks against members of an armed group wherever they are”.