US crude imports averaged 8.988 million b/d in May, an increase of 273,000 b/d from April, the US Energy Information Administration said Thursday.
Canada remained the top supplier with 2.006 million b/d, but the figure was 73,000 b/d below the April level.
Saudi Arabia held on to second place with 1.197 million b/d, up 108,000 b/d from April.
Mexico, in third place, boosted exports to the US by 181,000 b/d to 1.154 million b/d after a 213,000 b/d dip to 973,000 b/d in April.
Venezuela supplied an average 895,000 b/d in May, slightly down from the previous month's 902,000 b/d. Nigerian volumes also fell, by 48,000 b/d to 808,000 b/d.
The top five exporting countries accounted for 67% of the US' crude imports in May, the EIA said, adding that the top 10 sources -- including Colombia, Iraq, Angola, Russia and Algeria -- accounted for around 87% of the crude import total.
Canada also remained the top exporter of both crude and products to the US in May, with an average 2.481 million b/d, although this volume was down from April's 2.625 million b/d.
