A total of four people have now been arrested in connection with the murder and sexual assault of a horse.

The horse was found hacked to death in stables in Stifford Hill, Stifford on Monday.

The Shetland pony had been sexually assaulted during the attack.

A 31-year-old man from South Ockendon was arrested and bailed at the time.

On Thursday police arrested a 30-year-old man from South Ockendon and two others for assisting an offender.

They all remain in police custody where they are being questioned.