JERUSALEM (AP) — Six Palestinians have been wounded in a suspected firebomb attack by Jewish extremists in the West Bank, The Israeli military said.

The six were traveling in a taxi Thursday night when the firebomb was allegedly thrown into the car. The military suspects Jewish extremists to be behind the attack.

Prime Minister Benjamin Netanyahu condemned the firebombing, saying Israel "will do everything to catch those responsible and bring them to justice."

Extremist Israeli settlers often attack Palestinians and their property as part of a campaign they call the "price tag," which is meant to retaliate for either army action against settlers or Palestinian attacks. Several more firebombs were hurled earlier Thursday toward settler vehicles in the West Bank.

The Israeli military says it is still searching for the culprits.

In the United States, state department spokeswoman Victoria Nuland condemned the "heinous" attack, noting that the Israeli government had pledged to bring the perpetrators to justice.

"We look to Israeli law enforcement officials to do so expeditiously," she said in a statement. "We urge all parties to avoid any actions that could lead to an escalation of violence."