About a fifth of the world's crude oil and petroleum products pass through the Strait of Hormuz, a transit point between Iran and Oman.
Iran seized oil tankers in Gulf waters earlier this month, twice in one week.
The US State Department has called for the release of the seized tanker in the latest escalation in a series of actions against commercial vessels in Gulf waters since 2019.
The US military will work to strengthen its defense posture in the Gulf region after Iran has seized and harassed commercial shipping vessels in recent months, Reuters reported.
Washington has accused Iran of harassing, attacking or interfering with the navigational rights of 15 international flagged commercial vessels.
Speaking at a press conference, White House National Security Council Strategic Communications Coordinator John Kirby reiterated that "the United States strongly condemns actions that threaten and interfere with commercial shipping and will not allow foreign powers to jeopardize navigation in Middle East waterways."
The US Navy's Bahrain-based Fifth Fleet said it was working with regional allies to increase the rotation of ships and aircraft patrolling around the Strait of Hormuz.