The country's business chambers said the combination of highway, port and terminal blockades and looting this week forced many stores and businesses to close and threatened supplies of basic goods and fuel.
Two people were found dead near looting in the port city of Veracruz. An official said on Thursday that the killers had not yet been identified.
Mexicans were enraged by the 20 percent fuel price hike announced over the weekend as part of a government deregulation of the energy sector, AP reported.
While acknowledging the anger, President Enrique Pena Nieto said Thursday he would forge ahead anyway with the deregulated price scheme, which would do away with fuel subsidies and allow gasoline prices to be determined by prevailing international prices.