Tests have ruled out that a rogue batch of ecstasy known as “Superman” pills, which was responsible for the deaths of two Ipswich men, is connected to a third death in Rendlesham.

Tim Cracknell, a spokesman for Suffolk Constabulary, confirmed detectives investigating the tragedies are not linking the death of John Hocking, 21, to those of Lithuanian nationals Justas Ropas, 23, and Gedminas Kulokas, 24.

It is understood Mr Kulokas, who died at Provan Court, Ipswich, and Mr Ropas, of Bramford Lane, Ipswich, had taken the “Superman” tablets. These contained a substance called PMMA instead of the less toxic MDMA usually found in ecstasy.

Police have not revealed what was in the tablet taken by Mr Hocking, of Pembroke Avenue, Woodbridge. However, the details are expected to be released at his inquest which is due to take place at a later date.

A Polish-national Adrian Lubecki, 19, of St Matthew’s Street, Ipswich, is awaiting sentence in connection with the death of one of the Lithuanian men.

The 19-year-old pleaded guilty to being involved in the supply of drugs. At his plea hearing last month it was not revealed which of the men this related to.

Lubecki admitted being concerned in the supply of a class A drug, known as PMMA, to another between December 21 and January 2.

He also pleaded guilty to possessing a class B drug, amphetamines, with intent to supply on January 2.

Text messages on Lubecki’s mobile phone were said to have provided evidence of him supplying to others over a period of time.

It was alleged that Lubecki played a significant role in dealing drugs in the streets. During their inquiry police found a stash 400 to 450 “Superman” pills in the Norwich Road area of Ipswich.

Mr Ropas, a factory worker, died on Christmas Eve, while Mr Kulokas, a labourer, died on New Year’s Day - his 24th birthday. Mr Hocking also died on New Year’s Day.

Another young man’s death in Telford was also believed to be linked to the batch of “Superman” pills.

Daniel Bagnall, 27, was found dead on New Year’s Day. Damian Malolepszy, 28, of Hadley, has been charged with being concerned in the supply of ecstasy and possession with intent to supply a controlled drug of Class A .

His next hearing is due at Shrewsbury Crown Court on March 9.