Britain's government says it has frozen the assets of five men in connection with the alleged Iranian plot to assassinate Saudi Arabia's ambassador to the United States.

The country's Treasury said on Tuesday it had taken the action in connection with the purported plan to kill Saudi envoy Adel Al-Jubeir in a bomb attack.

Two men have been charged in the case -- Manssor Arbabsiar, a 56-year-old U.S. citizen who also holds an Iranian passport, and Gholam Shakuri, an alleged member of Iran's Quds Force, who is at large in Iran.

Both men have had assets frozen by the U.K., along with Hamed Abdollahi, Abdul Reza Shahlai and Qasem Soleimani, a Quds commander who allegedly oversaw the plot.

The U.S. has frozen the assets of the same five men.