WASHINGTON (AP) — Iran has chosen a former hostage-taker involved in the 1979 seizure of the U.S. Embassy in Tehran to serve as its ambassador at the United Nations, Sen. Ted Cruz said Tuesday in vowing to bar him from entering the United States.

Cruz said it was outrageous that Iran had selected Hamid Aboutalebi, who was a member of a Muslim student group that held 52 Americans hostage for 444 days, and was seeking a visa for him. The Texas Republican said he was offering legislation to ensure that Aboutalebi would be prevented from entering the country.