State oil company Pemex said Monday that a diesel spill at the dock of its refinery east of Houston, Texas, had been contained.

In a statement, Pemex said that the spill at the dock of its Deer Park refinery on Sunday was caused by an “interaction” — i.e., a collision — between two private vessels, one of which was carrying diesel and the other of which had delivered a load of an unspecified material and “was heading to the channel’s exit.”

The refinery is located on the Houston Ship Channel, which includes Buffalo Bayou, a slow-moving river.

Pemex said that “specialized personnel” at the Deer Park refinery contained the diesel spill.

“The Deer Park refinery immediately activated its protocols and informed the community and the relevant authorities through a level 3 CAER (Community Awareness Emergency Response) message,” the state oil company said, adding that it was estimated that the full cleanup would take approximately two days.

Pemex also said it was in close contact with the U.S. Coast Guard, and declared that there is “currently no impact on the navigation channel.”

In its CAER message on Sunday, Pemex said that the leak site had been “isolated” and that its oil spill team was “working to deploy oil booms to contain the spill.”

In another CAER message on Monday morning, the state oil company said “the diesel spill at our dock area remains fully contained, with no impacts to the surrounding community.”

Pemex acquired full control of the Deer Park refinery in 2021 after buying Shell’s 50% share in the facility for US $600 million. Last October, a gas leak at the refinery claimed the lives of two workers and hospitalized 13 more.

Sunday’s diesel spill at the refinery’s dock came three days after a fire broke out at Pemex’s Olmeca Refinery on the Tabasco coast. There were no injuries or fatalities last Thursday, but another fire just outside the refinery in March claimed five lives.

Pemex is Mexico’s largest company by revenue, but has debt in excess of US $80 billion. The state oil company operates seven oil refineries in Mexico in addition to the Deer Park facility.

With reports from López-Dóriga Digital and ABC 13