Two men were arrested and released on bail when a horse died after being raced on Bridlington’s north beach last Friday afternoon.
The horse, which was one of three being raced on the beach, is thought to have drowned when it was taken into the water just after 3.30pm on Friday.
Humberside Police said they had received reports of a group of travellers riding horses pulling traps up and down Bridlington north beach.
After the horse died, a 17-year-old boy and a 45-year-old man were arrested and released on police bail pending further enquiries.
RSPCA inspector Geoff Edmond said: “The RSPCA was contacted on Friday 19 July about a horse that died after being ridden into the sea at Bridlington.
“The RSPCA is investigating exactly what happened, along with Humberside Police.
“We have sent the horse’s body off for post mortem and are awaiting the results.
“If there are any witnesses who haven’t already come forward please call us on 0300 1234 999 or get in touch with the police on 101.”
While post mortem results have not yet come back, it is believed that the horse died from drowning.
Witnesses say they saw a group of travellers racing along the beach during the afternoon.
The horse was seen being taken into the sea, before its trap overturned.
It was then seen thrashing in the water, before its owners jumped in to try and resuscitate it by pumping on its chest.
Police received a 999 call at 3.49pm, and arrived on the scene shortly after.
They interviewed a number of witnesses on the beach, before arresting the two men.
The RSPCA arrived on scene at around 8pm.
They removed the horse’s body from the beach just after 9pm.
The charity, which is responsible for protecting animals, is now likely to lead the prosecution.
A spokesperson for Humberside Police said: “We would appeal for any witnesses to come forward particularly if they have information in connection with the identity of the person driving the horse and trap.”
Anyone with information should contact contact Humberside Police on the non emergency number 101, quoting log number 596.