A rescue operation took place after a worker got stuck in a 20ft hole on a construction site.
The incident happened on New Dock Street, Llanelli, after a skip of concrete fell as it was being lowered.
Three workers were in the hole, with two able to climb out, but a third fell awkwardly and needed help.
Two fire crews and a specialist line rescue team were sent to help the worker at about 17:00 GMT on Tuesday.
Phil Turnell, who was at the scene, said work was taking place to upgrade water and sewerage works.
He said a machine had lifted the skip of concrete and was lowering it in the hole when it toppled.
Mr Turnell said: "Two of the men were able to get out OK, but the third as he jumped out of the way (of the skip) landed awkwardly.
"He couldn't feel his legs, but he was fine, he wasn't unconscious or bleeding.
"They couldn't get him up the ladder on his own. It was a deep hole and they needed special rescue equipment."
Welsh Water said the worker was one of its contractors.
A spokeswoman added: "We will work with our contractor and the emergency services to fully investigate the cause of the incident."