BEIRUT: Two rockets slammed into a southern Beirut suburb Sunday, wounding four people, witnesses said. 

The witnesses said one of the rockets hit a car dealership while the other hit the balcony of a residential building in the Shiyyah area shortly before 7 a.m. local time. 

Four Syrian workers sleeping at the dealership were wounded and taken to a nearby hospital.

107-mm rockets were used in the attack, according to security sources. 

It was not immediately clear who fired the rockets.

The Shiyyah neighborhood is one of Beirut's southern suburbs where Hezbollah maintains its main offices.

The incident came 12 hours after Hezbollah chief Sayyed Hassan Nasrallah confirmed the group's participation in the fighting in Syria.

Caretaker Interior Minister Marwan Charbel, who arrived at the scene of the incident at 8 a.m., told reporters that authorities knew where the rockets had been fired from and said he believed the attack was an “act of sabotage.”

“The rockets were fired from a secluded area, southeast of the scene of the incident,” Charbel said, adding that authorities would release further details in the near future. 

“I believe this was an act of sabotage,” he said, when asked about the motive of the attack.

“I hope what is happening in Syria will not happen in Lebanon,” he added.

Asked whether the Free Syria Army may have played a role in the attack, Charbel said: “This is mere speculation.”

Abu Ali Qbeisi, described by local media as the owner of a car dealership in the area, said the attack was clearly linked to Nasrallah’s speech a day earlier. 

“This is a message, a reply to Nasrallah,” Qbeisi told a local television station.  

“Just as Hasan Nasrallah vowed victory, we will not be frightened by them,” he said. 

“Whatever they do, we are not afraid and long live Nasrallah,” Qbeis said.

Nasrallah revealed Friday the large-scale involvement of his party in the war in neighboring Syria, saying his party’s fighting against Syrian rebels aimed at protecting the resistance group.

During his one-hour speech, Nasrallah also urged that Lebanon be spared any armed confrontation that could spill over from Syria.

“We are fighting in Syria, you are fighting in Syria, let us continue to fight there,” he said. “Put Lebanon aside.”