Copycat attacks feared after Manchester synagogue attack on holiest Jewish dayCounterterrorism police and security services were placed on heightened alert last night amid fears of potential copycat attacks after two men were killed at a Manchester synagogueView 3 Images Counterterrorism police and security services were placed on heightened alert (Image: MEN)Counter-terrorism officers and security services were put on high alert last night over concerns of potential copycat strikes following the Manchester synagogue attack. ‌The Prime Minister cautioned that anti-Semitic hatred was "rising once again" as officers were stationed to safeguard Jewish places of worship nationwide following the Manchester incident, which occurred on Yom Kippur, the Jewish day of atonement. Two men in their thirties and a woman in her sixties were detained in relation to the incident. ‌Eyewitnesses reported seeing the men being escorted from a residence close to the synagogue, reports the Express. In an update form Police this morning the two men killed in the attack have been named as 53-year-old Adrian Daulby and 66-year-old Melvin Cravitz, both from Crumpsall.