Police in Paterson are searching for a rapist they believe may be responsible for two attacks in one week.A 25-year-old woman was attacked and sexually assaulted just before midnight Wednesday as she walked from a bus stop on East 39th Street. That attack was the second in three days. On Monday, a 16-year-old girl was walking on East 19th Street around 10:30 a.m. when she was attacked.Police suspect the two assaults could be the work of one person. Both victims were grabbed from behind and dragged into a backyard before being assaulted. Neither victim saw their attacker's face but both gave similar descriptions. Police are encouraging women not to walk alone, and to be mindful of their surroundings at all times.