A bus exploded in Jerusalem on Monday, wounding at least 21 people in what police are calling a "terror attack" reminiscent of the Palestinian suicide bombings common in Israeli cities a decade ago, according to Fox News.

"There is no doubt that this was a terror attack," said Jerusalem police commissioner Yoram Halevy, although no one has yet claimed responsibility. "We are investigating where the explosive device came from, who planted it, how it got on the bus. All this is in the initial stages of investigation," he said.

Police said the blast was caused by an explosive device detonated at the back of the bus. Bus driver Moshe Levy told reporters he had checked the bus for bombs twice before starting his journey. He was in a traffic jam when "suddenly there was an explosion in the back, I immediately understood it was a terror attack, I opened the doors of the bus so people could escape and told them to get out."

Police spokesman Micky Rosenfeld said that of the 21 victims, two were wounded seriously, seven moderately and the rest lightly. Another bus and a car nearby were also damaged by the explosion.

Israeli Prime Minister Benjamin Netanyahu vowed retaliation:

"We will locate those who prepared this explosive device. We will reach the dispatchers. We will also reach those behind them. We will settle the score with these terrorists."

The blast came as jittery Israelis prepared for the Passover holiday amid mostly stabbings, shootings and attacks where cars were used as weapons against civilians and security forces.

This bombing comes after a seven-month wave of Palestinian attacks in which 28 Israelis and two Americans have been killed. Israel has killed at least 189 Palestinians in return. most of them attackers, with the rest killed in clashes with security forces.

Hamas issued a statement praising the bus bombing, naturally, but did not take responsibility for it. A Hamas spokesman said, "This attack affirms to everyone one that our people will not abandon the resistance path."

Some mosques in Gaza also broadcast from their loudspeakers messages of praise for the attack.

HonestReporting.com notes that CNN called the terror attack a "bus fire" in a headline even after CNN itself announced that the police had declared the blast a terror attack.

Media bias much?

Also according to Fox News, Vice President Joe Biden took the terrorist attack as an opportunity not to show solidarity with our Israeli allies against Palestinian Nazism, but to excoriate Netanyahu and his government for leading Israel "in the wrong direction." In a speech to the Israel advocacy group J Street, Biden said,

"I firmly believe that the actions that Israel's government has taken over the past several years -- the steady and systematic expansion of settlements, the legalization of outposts, land seizures -- they're moving us, and, more importantly, they're moving Israel in the wrong direction," Biden said.

Thanks for making it clear whose side the Obama administration is on, Joe -- as if we didn't already know. See TruthRevolt's Tiffany Gabbay's piece elaborating on Biden's comments here.