Four men who threw a pig's head into the grounds of a mosque two days after the murder of Fusilier Lee Rigby have been jailed. Thomas Ashton, 21, Andrew Warner, 31, Travis Crabtree, 25, and Steven White, 28, dumped a carrier bag containing the severed head in the car park of Blackpool Central Mosque as part of a prank. The crime was described as 'poisonous' by Judge Graham Knowles who jailed the four -  despite pleas by the imam of the Lancashire mosque to be lenient with them. Andrew Warner, 31, (left) and Travis Crabtree, 25 (right) have been jailed after they were part of a gang of four who threw a severed head into Blackpool Central Mosque just two days after the murder of Fusilier Lee Rigby
@highlight
Men threw a pig's head into a mosque two days after murder of Lee Rigby
@highlight
Thomas Ashton, Andrew Warner, Travis Crabtree and Steven White left the head at Blackpool Central Mosque two days after the soldier was murdered
@highlight
Lee Rigby was killed by Islamic extremists in Woolwich, London, in 2013
@highlight
Video footage on White's phone recorded comments about Muslims, suggesting they knew contact with pigs is forbidden in Islamic teachings
@highlight
Imam begged for the four to be spared prison but judge jailed all four men
@highlight
They admitted causing religiously aggravated intentional harassment
Pigs are forbidden for @placeholder to touch or have contact with.