London, Nov 4 (IANS): A woman in Britain died after getting trapped in a sea cave off the Dorset coast. Though her brother was rescued, she remained stuck in the cave accessible only either underwater or through a little blowhole.

Rescue teams were called after walkers spotted a man in the sea, close to Tilly Whim Caves. Once airlifted to safety, he told the coast guards that his sister was trapped in a tiny cave that could only be accessed underwater or through a tiny blowhole, The Independent reported.

The incident occurred Friday afternoon.

Though the woman was alive when rescuers arrived on the scene, treacherous conditions prevented them from getting to her.

"Entry to the cave was either underwater, or through a narrow blowhole at the top of the cave," Swanage coast guard, one of the teams at the scene, was quoted as saying in a media report. “The rescue was considered to be at the very edge of our technical capability.”

Dorset, a county in south west England, is on the English Channel coast. Covering an area of 2,653 sq. km, Dorset borders the counties of Devon to the west, Somerset to the north-west, Wiltshire to the north-east and Hampshire to the east.