Lawmakers have sent letters to the European Union urging it to cancel a planned visit to Iran by EU Parliament members.

One letter, sent by Sens. Jeanne Shaheen (D-NH) and Benjamin Cardin (D-MD) to European Parliament President Martin Schultz, cited Iran’s illicit nuclear program and human rights record.

“Given Iran’s failure to comply with the United Nations Security Council and suspend its nuclear enrichment program, the lack of progress to date on the P5+1 nuclear negotiations, Iran’s increased interference inside Syria on behalf of the Assad regime, its state sponsored terrorist activities around the globe and its abysmal human rights record, sending a delegation to Iran for a seven-day visit sends the wrong message at this particularly sensitive time,” the letter states.

The second letter, sent by Rep. Peter Roskam (R-IL) to EU Ambassador João Vale de Almeida, expressed similar sentiments.

“The EU has done good work recently in strengthening sanctions on Iran, but a trip such as this would undermine the message sent by those sanctions while emboldening hostile leaders that should instead feel increasing isolation,” says Roskam’s letter.