MADRID, Feb 3 (Reuters) - Gibraltar on Friday accused Spain of a "gross violation of British sovereignty" after two customs officials entered the British overseas territory during an anti-smuggling operation. Early on Thursday, two Spanish customs agents were injured after rocks were thrown at them on a Gibraltar beach. In a video of the incident on Spanish daily El Pais' website, the smugglers are seen shouting "This is Gibraltar. The incident comes as Britain and Gibraltar seek to negotiate a treaty to settle Gibraltar's post-Brexit status and how to police the border with Spain. In 2002, 99% of voters in Gibraltar rejected the idea of Britain sharing sovereignty with Spain.

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