A fire that raged on Wednesday through this capital's largest retail food market caused no casualties, Mexican authorities told Efe.

Investigators are working to determine the cause of the blaze, according to an official in the Mexico City borough of Venustiano Carranza, home of the La Merced market.

The fire broke out at 4:30 a.m. and was brought under control within four hours, capital emergency services chief Fausto Lugo Garcia said in a statement.

Firefighters deployed across 8,000 sq. meters (86,000 sq. ft.) of the market to subdue the blaze, he said.

Authorities ordered around 200 people living near La Merced to leave their homes as a precaution and closed down several streets in the vicinity of the market.

La Merced, one of Mexico City's oldest and busiest markets, is usually packed on Sunday, the traditional day for food shopping in the capital. EFE