Mexico forces seize huge marijuana haul in Tijuana

Mexican security forces have seized 105 tonnes of marijuana with a street value of at least $340m (£214m) - the biggest such haul in the country in years.

Heavily armed troops and police raided several homes in the city of Tijuana, on the border with the US, exchanging gunfire with suspected traffickers.

The marijuana was found wrapped in some 10,000 packages.

Drug gangs are increasingly producing marijuana in Mexico, rather than smuggling the drug from South America.

"The seizure of these drugs is without precedent in the country," army General Alfonso Duarte told reporters.

The operation began after municipal police came under fire from gunmen in a convoy of vehicles as they were on patrol in Tijuana, which lies just across the border from San Diego, California.