According to an army statement released by Lebanon’s official National News Agency (NNA) on Thursday, five people involved in the thwarted assaults, including the mastermind, were detained.

“Those arrested confessed to having carried out terrorist acts against the army previously. Investigations are continuing,” the statement read.

On June 27, eight bombers launched two waves of attacks on the northeastern Christian village of Qaa, located on the border with violence-wracked Syria, killing five people and injuring almost 30 others.

There has been no claim of responsibility for the deadly bombings, but security officials believe ISIS terrorists were behind the raids.

Lebanese security chiefs have warned of a heightened terrorist threat in the wake of the Qaa attacks, with Prime Minister Tammam Salam raising concerns about "a new wave of terrorist operations.”

Lebanon’s Interior Minister Nohad Machnouk said most of the Qaa bombers came from crisis-hit Syria.

Authorities have arrested some 120 Syrians from makeshift refugee camps in the country over the past few days, a security source said.

Lebanon is suffering from the spillover of militancy in neighboring Syria where foreign-backed terrorists have been fighting the government forces since 2011.

ISIS and al-Nusra Front, which is the Syrian branch of al-Qaeda militant group, have been active on the regions situated close to the Syrian border.

Last November, however, more than 40 people were killed and dozens of others wounded after two bombings, claimed by ISIS extremists, targeted a security post in the Bourj el-Barajneh area in the southern suburb of the Lebanese capital, Beirut.

Assisting Syrian army forces, fighters with the Lebanese Hezbollah resistance movement have fended off several ISIS attacks.

Hezbollah says its military mission in Syria is aimed at preventing the spillover the Syria crisis into Lebanon.

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