A cargo plane belonging to an Iranian airline sanctioned by the United States landed in Venezuela on Tuesday. It is not clear what the plane brought amid continued US pressure on both Iran and its South American ally.

The Qeshm Fars Air flight landed in the Venezuelan capital, Caracas, from Iran, the Venezuelan opposition politician Jose Manuel Olivares said in a tweet Tuesday. Reuters reported that that the EP-FAB Boeing 747 took off from Iran and made stops in Tunisia and Cape Verde before reaching Venezuela. It is unclear what the aircraft transported, according to the outlet.

The US Department of the Treasury sanctioned Qeshm Fars Air in 2019 for providing support to Iran’s Islamic Revolutionary Guard Corps, which the United States designates as a terrorist organization.

The United States sanctions both Iran and Venezuela. The US government accuses Iran of building a nuclear weapon and opposes its proxy groups that fight the United States and its allies in the Gulf and Israel. The United States supports an opposition government to socialist President Nicolas Maduro’s in Venezuela.