GUN runners who supply firearms used in murders could face up to life in prison under plans being considered by the Government.

Home Secretary Theresa May said the "middle men are as responsible as those who pull the trigger".

It follows concerns from police chiefs and politicians that current sentences of up to 10 years are too lenient.

"We need to target not just those who use illegal firearms but those who import or supply them," Mrs May said.

"We must ensure our laws properly punish and deter all criminals and protect our communities."

The Association of Chief Police Officers said there were only a small number of guns in circulation which were traded between gangs and used in a series of attacks.

The Government is considering whether a new offence of possession of illegal firearms with intent to supply is needed and whether the maximum sentence for illegally importing firearms should be increased.