MEXICO CITY, June 14 (Reuters) - Dozens of flights at an international airport in the northern Mexican state of Sinaloa were suspended Wednesday as protests by farmers demanding guaranteed prices for grains ramped up a standoff with the government. Producers urge President Andres Manuel Lopez Obrador to guarantee prices for corn, wheat and sorghum, saying government intervention is vital to counter a steep drop in international prices. Saying they had no response, a group of farmers marched to Culiacan airport and blocked the doors in videos shared on social media. In other videos, farmers entered government offices and tipped grain from bags onto the floor. Sinaloa Governor Ruben Rocha asked farmers to instead protest commodities trader Cargill (CARG.UL) and Mexican corn product makers Minsa and Gruma, implying they were responsible for lower prices.

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Persons: Andres Manuel Lopez Obrador, Wheat, Ruben Rocha, " Rocha, Minsa, Cassandra Garrison, Lisa Shumaker Organizations: MEXICO CITY, Farmers, Chicago Board, Sinaloa, Cargill, Agriculture Ministry, Thomson Locations: MEXICO, Mexican, Sinaloa, Culiacan, Phoenix , Arizona, Mexico