Honolulu police shut down the Ala Kapuna off-ramp along Moanalua Freeway Honolulu-bound for about two hours this afternoon to investigate a suspicious vehicle that may contain explosives, police dispatch reported.

An Army spokesman said two men had been arrested in connection with the case.

Col. Mike Donnelly, chief of public affairs for U.S. Army Pacific, would not elaborate, but said the men had apparently tried to get into the Aliamanu Military Reservation housing area. They earlier tried to get onto other military installations on Oahu, he said.

A black mid-size sport utility vehicle was stopped at the gate while the investigation continued.

Donnelly said the two men were spotted trying to enter at least two other "Leeward Oahu military bases" that he would not name. 

"Military police put out what we call a ‘be-on-the-lookout’ list and quickly thereafter, they tried to access another base and we apprehended them … here at Aliamanu Military Reservation," Donnelly said.

Police also closed Ala Kapuna Street, starting at the overpass, heading mauka and the mauka gate to Aliamanu military housing. The off-ramp, overpass and gate were reopened just after 5:25 p.m.

The SUV also was moved.

It was not clear if any explosives were found in the SUV..

"The military always takes precautions to safeguard its personnel and its families," Donnelly said. "So if there’s an ounce of suspicion, we always take the appropriate actions."