One person is believed to be trapped under rocks after a landslide at a beach.
Police, the fire service, ambulance service and the Coastguard were dealing with the incident near the Freshwater Beach Holiday Park at Burton Bradstock, near Bridport, Dorset.
The Maritime and Coastguard Agency said Portland Coastguard was told a person was trapped under the fallen rocks between Freshwater and Burton Bradstock in an emergency call received just before 12.30pm.
The incident comes two weeks after Somerset couple Rosemary Snell, 67, and Michael Rolfe, 72, were killed in a landslide at the Beaminster Tunnel just nine miles away.
In a joint statement Dorset Police and Dorset Fire and Rescue Service said: "At just after 12.30pm today Dorset Police were called to a report from the coastguard of a landslide by the Freshwater Beach Holiday Park.
"Officers, with assistance from the Police Helicopter, are currently working alongside Dorset Fire and Rescue Service and other agencies to search the area.
"The Urban Search and Rescue Team (USAR) from Devon and Somerset has also been deployed to this incident. This is a national resource.
"The landslide was reported to be 400 metres from Freshwater caravan park and the caller reported that a person was trapped under the fallen rocks."
Witnesses claim there had been one death at the site, which is known locally as Hive Beach.
The landslide comes just over two weeks after severe flooding left much of the community under water.
Residents said that flood water surged to heights of about one metre at its worst, forcing home owners to flee and scattering vehicles through the village.