(JNS) Israeli Prime Minister Benjamin Netanyahu and Egyptian President Abdel Fattah el-Sisi spoke in the wake of the terrorist attack along the Sinai border that killed three IDF soldiers.

El-Sisi extended his “deepest condolences” over the incident, and Netanyahu thanked the Egyptian leader for agreeing to a “thorough and joint investigation,” according to an Israeli readout of the call.

“The two leaders expressed their commitment to continue strengthening the peace and security cooperation that is vital to both countries,” added the statement.

The terrorist who killed three Israeli soldiers over the weekend was identified on Monday as Mohamed Salah Ibrahim.

Ibrahim shot dead Sgt. Lia Ben-Nun, 19, and Staff Sgt. Uri Iluz, 20, overnight on Friday while they were manning an observation post near the border. During the subsequent manhunt, Staff Sgt. Ohad Dahan, 20, was killed in Israeli territory in an exchange of fire with the terrorist, who was also fatally shot.

A preliminary investigation found that Ibrahim crossed the border through an emergency gate used by IDF soldiers in coordination with Cairo.

Egypt claimed he had crossed the border to chase drug smugglers in the aftermath of an earlier bust.

However, Israel’s Army Radio reported on Sunday that the Egyptian policeman had in his possession six magazines for his rifle, a Koran and a knife. The IDF believes that the presence of the Koran suggests that Ibrahim was motivated by Islamic religious extremism, the report said.