Military Examining Magistrate Judge Fadi Sawan questioned on Monday Ahmed al-Hujairi , a detainee from al-Hujairi family, who was wanted on an arrest warrant for involvement in an ambush of a military patrol in the northeastern border town of Arsal, according to Voice of Lebanon radio.
Judge Sawan also issued four arrest warrants in absentia against four suspects, whose whereabouts remain unknown.
So far the Lebanese army has arrested 11 people in connection with the February 1 clashes that broke out in Arsal.
Two officers were killed in the clashes.
President Michel Suleiman, Prime Minister Najib Mikati and several officials have continuously called on the residents of Arsal to hand over the culprits.
Last week, dozens of Arsal residents burned tires and blocked roads to protest the tight security measures in the town.