In May 2011, U.S. President Barack Obama imposed sanctions on Venezuela's state oil company PDVSA for defying US law and sending “Iran two tankers of an oil product.” In September 2011, Ahmadinejad postponed a visit to Caracas while Chavez recovered from a fourth round of cancer treatment, according to officials. Several days earlier, the two countries had “signed cooperation deals on manufacturing, energy, construction and agriculture during talks in Caracas.” Around this time, Maduro stated that ““While imperialism and its criminal elites have declared war on the Muslim people since more than 10 years ago, we in the Bolivarian Revolution, led by President Chavez, declare our love for the culture of Muslim people, all their history, and declare our eternal brotherhood.”