Iran's bloody crackdown on nationwide protests killed at least 6,126 people while many others still are feared dead, activists said Tuesday, as a U.S. aircraft carrier group arrived in the Mideast to lead any American military response to the crisis.

The USS Abraham Lincoln aircraft carrier strike group has crossed into Central Command, the Middle East region that includes Iran.

President Donald Trump indicated Iran is seeking negotiations as the USS Abraham Lincoln carrier enters the region and protests continue inside Iran.

Iran and its militia allies say they will respond aggressively in the region if attacked. A U.S. aircraft carrier and warships are approaching the region.

Iranian authorities unveiled a new mural on a giant billboard in a central Tehran square on Sunday with a direct warning to the United States to not attempt a military strike on the country, as U.S. warships head to the region.

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As many as 30,000 people could have been killed in the streets of Iran on Jan. 8 and 9 alone, two senior officials of the country’s Ministry of Health told TIME—indicating a dramatic surge in the death toll.

Footage from a hospital in Tehran shows at least 31 bodies piled inside and seven body bags outside.

Iranian state media highlight U.S. unrest over protests against Immigration and Customs Enforcement (ICE).

President Trump has received multiple U.S. intelligence reports indicating that the Iranian government’s position is weakening, according to several people familiar with the information. The reports signal that the Iranian government’s hold on power is at its weakest point since the shah was overthrown in the 1979 revolution.