Israeli police say suspected Jewish extremists fired a pair of tear gas canisters into the home of a Palestinian family in the West Bank and Hebrew graffiti was sprawled on the house during the attack.

The family was asleep and unharmed in the Tuesday morning attack. Police spokeswoman Luba Samri says an investigation is underway.

Jewish extremists have for years vandalized or set fire to Palestinian property, as well as mosques, churches, the offices of dovish Israeli groups and even military bases. The so-called "price tag" attacks seek to exact a cost for Israeli steps seen as favoring the Palestinians.

Prime Minister Benjamin Netanyahu has pledged "zero tolerance" for such attacks and Israel has authorized a series of steps, including administrative detention, to help stamp out the trend.