A vandal hurled a Molotov cocktail through the window of a Staten Island church Sunday, sources said.

The firebomb sailed through an open window at St. Paul’s Memorial Episcopal Church on Saint Paul’s Avenue in Stapleton and landed on the cement floor around 10:30 a.m., sources said.

The Rev. Frederick Schraplau, 72, told police that the church was unoccupied at the time and there was no real damage to the building, sources said.

Police are still looking for the culprit.