POLICE are looking for three men after 165 kilos of heroin was seized from an industrial unit in Oldbury.

The heroin was concealed within metal lathes in a sea container which had arrived into London Gateway Port from Pakistan on July 1 and delivered to the unit.

Investigators raided the unit on July 5 and arrested three men on suspicion of conspiracy to import heroin − a 41-year-old from Bearwood, a 32-year-old from Small Heath and a 33-year-old man from Castle Bromwich. A fourth man, aged 29, was arrested later at an address in Yardley All of the men were released on bail until January 2015.

Three other men have been arrested since the seizure on suspicion of conspiracy to import heroin − a 34-year-old from Oldbury, a 34-year-old from Quinton and a 50-year-old from Stanwell in Surrey. They have also been bailed until January.

Investigators are now keen to speak to three other men believed to be from the Birmingham or Sandwell areas who may be able to assist with the investigation.

The first man is approximately 20-years -old, with a thin build, and clean shaven with short brown hair. He was present as the container was unloaded earlier in the day and spoke at length with one of the arrested men.

The second man is Asian, aged 40-45, with a moustache and greying short black hair. He used a fork lift truck to unload the container during the morning.

The third man is also Asian, aged 30-45, bald and of medium build. He visited a DIY shop in Handsworth on July 5 between 1pm and 2pm and purchased an angle grinder. Investigators believe the tool was used to dismantle the lathes at the unit.

Paul Risby, Birmingham branch commander at the National Crime Agency, said: “We believe these men are connected to this large heroin seizure. They may have key information that will assist us with our investigation. I’d urge them to come forward. I’m also keen to hear from members of the public who might recognise them."

Anyone with information is asked to contact Crimestoppers anonymously on 0800 555 111 or the National Crime Agency on 0370 496 7622.