HOUSTON/MEXICO CITY, April 26 (Reuters) - Mexican state oil company Pemex is reversing crude exports cuts of at least 330,000 barrels per day (bpd) planned for May amid a smaller-than-expected oil demand by the company's domestic refineries, two sources close to the decision said on Friday.

Pemex's international trading unit in April began enforcing exports cuts over supply crude contracts to customers in the United States, Asia and Europe to increase its availability of crude for domestic refining, especially in preparation of its Dos Bocas refinery startup.

But planned maintenance at some refineries and a slower-than-expected startup at Dos Bocas will reduce the need for domestic crude in May, the two sources and an additional person with knowledge of the company's operations said.

Pemex did not immediately respond to a request for comment.

(Reporting by Marianna Parraga and Stefanie Escenbacher; Editing by Leslie Adler)