Senators Jim Risch, a Republican, and Jeanne Shaheen, a Democrat, urged the State Department not to delay issuing a report to Congress required under sanctions passed in the annual defense policy bill, which they said was due by February 16.
The report will identify companies involved in constructing, insuring and verifying Nord Stream 2. The law requires the sanctions to be imposed on the companies listed.
"We look forward to working with you to bring an end to this dangerous project,” the senators said in a joint letter.
"Press reports that the German government has put forth an offer that would require the United States to disregard statutorily-mandated sanctions,” they added.
As we reported earlier, Russia's vessel Fortuna resumed laying pipes for the Nord Stream 2 gas pipeline in Danish waters.
Construction of the link, which would double the capacity of the existing Nord Stream pipeline to 110 billion cubic metres of gas annually, was suspended in December 2019 due to the threat of sanctions from Washington.
However, the German government has stood by the project and late in December a vessel called the Fortuna, which was subsequently put under sanctions by Washington, laid a 2.6 km (1.6 miles) portion of the pipeline in German waters.