An investigation into the death of three people at two properties in South Bank, Middlesbrough continue to be investigated as four people have been arrested for 'noxious substance' offences.

Police first started investigating after a man’s body was found at an address on Ajax Way on Saturday, July 15 this year.

The man was later identified as Kevin Conway, 41.

Read more: Police investigating 'unexplained' deaths in South Bank

In a further incident, officers found the body of a woman at a property on Ajax Way on the evening of Monday, September 18 after responding to concerns for an occupant of the address.

The woman has now been named as Stephanie Alderson, 35.

The Northern Echo: L-R are Kevin, Stephanie and KathleenL-R are Kevin, Stephanie and Kathleen (Image: CLEVELAND POLICE)

The following day, on Tuesday, September 19, officers were called to a report of another sudden death at a property on South Court in South Bank where a woman, aged 38, had died.

She has now been identified as Kathleen Broomfield.

The Northern Echo: Forensic teams on the scene at South BankForensic teams on the scene at South Bank (Image: TERRY BLACKBURN)

At this time police are continuing to treat the deaths as unexplained as enquiries continue and detectives await the results of further tests to establish the cause of their deaths.

A 43-year-old woman, who was arrested previously in relation to the death in July, has been re-arrested in connection to that death as well as the two recent deaths on suspicion of administering a noxious substance.

The Northern Echo: A police van outside Aja Way in South BankA police van outside Aja Way in South Bank (Image: TERRY BLACKBURN)

Three others, two men aged 47 and a 39-year-old woman, have been arrested on suspicion of administering a noxious substance in relation to the death of Kathleen Broomfield.

All four remain on bail whilst enquiries are ongoing.

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A Cleveland Police spokesperson said: "Following three deaths in the South Bank area which have occurred over a three-month period, officers are now investigating any links between the deaths of a man and two women.

"At this time police are continuing to treat the deaths as unexplained as enquiries continue and detectives await the results of further tests to establish the cause of their deaths. The families of all three have now paid tribute to them.