MORE than 100 liquid-filled tubes have washed up on a west Cornwall beach.
The beach was been temporarily closed today and the public warned not to open any of the phials washed up at Godrevy Towans, Hayle.
Police initially believed the tubes to contain a type of casamino acid but the Health Protection Agency later said it was a substance called Triptone.
"This a protein based growing medium used in microbiology," said a spokesperson for Cornwall Council which helped coordinate the clean up.
"This substance is not hazardous and, therefore, does not present a risk to public health.
"The Council is continuing to monitor the situation and we are still advising members of the public not to touch the glass phials and to report sightings to the coastguard so they can be removed and disposed of."
The initial warnings came this morning after a member of the public handed a carrier bag full of phials to police in Camborne.
Officers arrived at the beauty spot and uncovered more of the five-inch long tubes, which had a red metal screw top and contained a clear liquid.
It was reported that they have been washed up between Gwithian and Riviera Downs. The largest amount was recovered from a drum at Mexico beach, police said.
It is not known where the phials have come from but police officers said they are covered in French writing.
The tubes have since been passed to the fire service who will dispose of them securely.
The Environment Agency was informed and took the decision the temporarily close the beach.
Anyone who comes across the tubes is asked not to touch them and to contact the coastguard on 01326 317575.