Police are investigating two anti-Semitic attacks last weekend against Yeshiva Mercaz Hatorah of Belle Harbor. A Hatzoloh ambulance parked on the yeshiva’s property (seen here) was marred in red spray paint at about 1:30 a.m. Saturday. Witnesses from the yeshiva saw the masked vandal, but could not dial 911 because it was the Sabbath, police said. A second incident, in which “Hail Hitler” (sic) was scrawled in black spray paint on the yeshiva’s brickwork, happened Sunday morning. No one has been arrested. Police, who are investigating both as possible biased incidents, asked anyone with information to call the NYPD Hate Crimes Task Force at (646) 610-5267.