FILE PHOTO: The headquarters of energy pipeline operator Enterprise Products Partners seen in Houston, Texas, U.S. September 27, 2020. REUTERS/Gary McWilliams/File Photo

By Nicole Jao and Arathy Somasekhar

NEW YORK (Reuters) -Enterprise Products Partners said on Wednesday it was responding to a crude oil leak from the company's oil terminal in southeast Houston.

Crude oil flows on the Seaway pipeline, which runs from Cushing, Oklahoma, to the Freeport, Texas, area and connects to the Enterprise Crude Houston (ECHO) terminal, fell early on Wednesday, four sources said. A portion of the pipeline went down on Tuesday night, three sources said.

The cause of the release is under investigation, Enterprise said, adding there was no offsite impact, fire, or injuries from the oil leak.

Enterprise activated its emergency response plan and has begun cleanup, the company said in a statement, adding it was coordinating with regulatory authorities to address the leak and resume normal operations.

The price of West Texas Intermediate crude at East Houston, called MEH, climbed by as much as 35 cents to about a $1.30 premium to WTI at Cushing in early Wednesday trading, a trade source said. The ECHO terminal is a physical delivery point for Midland crude oil in Houston.

It traded around 90 cents at market close on Wednesday.

The ECHO terminal also provides crude oil storage to customers with access to major refineries along the Texas Gulf Coast and has connections to marine terminals that in turn supply other domestic and international refineries.

The Seaway pipeline is a 50-50 joint venture between Enterprise, which operates the line, and Canada's Enbridge. Enbridge directed questions about Seaway's operations to Enterprise.

Operations on the pipeline are expected to be restored later on Wednesday, two sources said.

(Reporting by Nicole Jao in New York and Arathy Somasekhar in Houston; Editing by Mark Porter, Nia Williams, Rod Nickel)