An American aircraft carrier has passed through the Strait of Hormuz into the Persian Gulf, in what the U.S. Navy is calling a routine maneuver.
With U.S. - Iranian tensions heightened, the USS Abraham Lincoln entered the Gulf on Sunday to conduct scheduled maritime security operations. The carrier had just arrived in the United States Central Command area on Thursday, replacing the USS Stennis, which is now headed home.
"USS Abraham Lincoln (CVN 72) completed a regular and routine transit of the Strait of Hormuz, January 22, to conduct maritime security operations as scheduled and in support of requirements set by the combatant commander. The transit was completed as previously scheduled and without incident," the U.S. Navy said in a statement.
In December Iranian officials had warned the U.S. not to return after the carrier USS John Stennis departed the Gulf. Iran also suggested the Strait may be closed in retaliation for fresh economic sanctions imposed against the country.
On Saturday Iran indicated that it viewed U.S. naval operations in the Gulf as normal, The AP reported.
The other U.S. carrier currently in the region is the USS Carl Vinson, which is in the Arabian Sea and is providing air cover for troops in Afghanistan.
ABC News' Luis Martinez and The Associated Press contributed to this report.