Students have been evacuated from Cardiff University following a chemical leak on campus.

Paramedics are said to be treating a "small number" of people in the university's Main Building where emergency services were scrambled at around 11.20am.

The university said the spill was "contained" and added there were no "reported serious injuries or casualties".

It tweeted: "We are aware of a chemical spill in the University’s Main Building.

"This is a contained incident but the building has been evacuated & temporarily closed. Emergency services are currently on site. At this stage, there are no reported serious injuries or casualties reported.

"A small number of people are being checked by paramedics as a precautionary measure. Main Building will remain temporarily closed until we are confident there is no risk to health and safety."

Chemistry student Oscar Hulm told Wales Online: "We were on the other side of the building, but the chemical spill was in Natural Sciences."

Another chemistry student Theodore Tadros added: "Fire alarms went off and we left very prompt - it wasn't very ordered. People won't be able to go back in to get their stuff until tomorrow probably.

"Some people have left their keys indoors but there's been talks about letting people in later on to grab them. But it's all up in the air at the moment."

A Welsh Ambulance Service spokesperson said: "We were called to an incident at Cardiff University at 11:20am this morning. We have deployed a rapid response vehicle, two emergency ambulances and are being supported by the Hazardous Area Rescue Team. This incident is currently ongoing."

A South Wales Police spokesperson said: "Emergency services are dealing with an incident on Park Place, #Cardiff. The road is closed between Museum Place and Cathays Terrace.

"Motorists are advised to avoid the area and use alternative routes where possible."