As industrial enterprises grew in Mexico, workers organized to assert their rights. Strikes occurred in the mining industry, most notably at the U.S.-owned Cananea Consolidated Copper Company in 1906, in which Mexican workers protested that they were paid half what U.S. nations earned for the same work. U.S. marshals and citizens crossed from Arizona to Sonora to suppress the strike, resulting in 23 deaths. The violent incident was evidence that there was labor unrest in Mexico, something the Díaz regime sought to deny. The enforcement of labor discipline by U.S. nationals was publicly seen as a violation of Mexican sovereignty, but there were no consequences for the government of Sonora for permitting the foreigners' actions. The Díaz regime accused the radical Mexican Liberal Party of fomenting the strike. The significance of the strike is disputed, but one scholar considers it "an important benchmark for the Porfirian labor movement as well as the regime. It raised the social question in a dramatic fashion, and at the same time fused it with Mexican nationalism. In 1907, workers at the French-owned Río Blanco textile factory engaged in a dispute after being locked out from their factory. Díaz sent the Mexican army to suppress the action, resulting in loss of life of an unknown number of Mexicans. Before 1909 most workers were reformist and not anti-Díaz, but did seek government intervention on their behalf against foreign owners' unfair practices, particularly regarding wage differentials.