A fuel spill has forced authorities to close several beaches in Valencia, Spain.

The affected areas include l'Arbre del Gos, El Saler, and Garrofera beaches, where red flags have been raised to prohibit swimming.

The spill, believed to be hydrocarbons, extends for about two kilometers along the coast.

Emergency services have activated response plans and are coordinating with Maritime Rescue to assess the situation.

Cleanup efforts have begun and are expected to continue into Wednesday.

The origin of the spill is under investigation, with suspicions pointing towards a ship in the Port of Valencia.

Local officials are calling for an immediate investigation to determine the source of the contamination.