Vehicles belonging to forces loyal to Libyan leader Muammar Gaddafi explode after an air strike by coalition forces, along a road between Benghazi and Ajdabiyah March 20, 2011.[Agencies]

TRIPOLI, Libya – A cruise missile blasted Moammar Gadhafi's residential compound in an attack that carried as much symbolism as military effect, and fighter jets destroyed a line of tanks moving on the rebel capital. The US said the international assault would hit any government forces attacking the opposition.

Related: Libya vows 'long war' after western strike

Oil prices jumped to near $103 a barrel Monday in Asia after the Libyan leader vowed a "long war" amid a second night of allied strikes in the OPEC nation.

It was not known where Gadhafi was when the missile hit near his iconic tent late Sunday, but it seemed to show that while the allies trade nuances over whether the Libyan leader's fall is a goal of their campaign — he is not safe.

Half of the round, three-story administration building was knocked down, smoke was rising from it and pieces of the missile were scattered around. About 300 Gadhafi supporters were in the compound at the time. It was not known if any were hurt.

The US military said the bombardment so far — a rain of Tomahawk cruise missiles and precision bombs from American and European aircraft, including long-range stealth B-2 bombers — had hobbled Gadhafi's air defenses.

In addition to targeting anti-aircaft sites, US, British and French planes also went after tanks headed toward Benghazi, in the opposition-held eastern half of the country. On Sunday, at least seven demolished tanks smoldered in a field 12 miles (20 kilometers) south of Benghazi, many of them with their turrets and treads blown off, alongside charred armored personnel carriers, jeeps and SUVs of the kind used by Gadhafi fighters.