The world-famous British Museum was evacuated on Saturday after visitors reported eye irritation from what they thought was a chemical leak, officials said. Police were called after some visitors reported a strange smell and stinging eyes, Reuters quoted a police spokesman as saying. A museum spokeswoman said the sprawling galleries were cleared after a supposed "chemical incident" was reported. She said about 8,000 visitors would typically have been in the museum, whose collections include priceless and ancient objects from around the world, on a Saturday afternoon. The fire brigade was also called but could not find the source of the smell and eventually gave the museum, a top London tourist attraction, the all-clear. "No-one required treatment. The museum was evacuated as a precaution. It has since reopened," the police spokesman said.