People gather for a candlelight vigil to remember the victims of the Ukraine plane crash, at the gate of Amri Kabir University…
People gather for a candlelight vigil to remember the victims of the Ukraine plane crash, at the gate of Amrikabir University that some of the victims of the crash were former students of, in Tehran, Iran, Jan. 11, 2020.

The black box of a Ukrainian passenger airliner mistakenly shot down over Iran last month is damaged and Iran will not hand it over to another country despite pressure for access, state media quoted top Iranian ministers as saying on Wednesday.

Canadian Prime Minister Justin Trudeau said last week that he had "impressed upon" Iranian Foreign Minister Mohammad Javad Zarif that a complete and independent investigation into the shooting down of the airliner had to be carried out.

Ukraine International Airlines Flight PS752 was brought down after it took off from Tehran on January 8, killing everyone on board. The 176 victims included 82 Iranian citizens and 63 Canadians, many of them of Iranian origin.

The crash occurred with Iran's air-defense forces on high alert following an Iranian ballistic-missile attack a few hours earlier against U.S. forces in Iraq. The strikes came days after Iran's most prominent military commander, Qasem Soleimani, was killed in a U.S. drone strike in Baghdad.

"We have a right to read the black box ourselves. We have a right to be present at any examination of the black box," Zarif said.

"If we are supposed to give the black box to others for them to read it in our place then this is something we will definitely not do," he said.

General view of the debris of the Ukraine International Airlines, flight PS752, Boeing 737-800 plane that crashed after take-off from Iran's Imam Khomeini airport, on the outskirts of Tehran, Iran Jan. 8, 2020.

However, Iran is in discussions with other countries, particularly Ukraine, about the investigation, Zarif said.

Defense Minister Amir Hatami said the flight data recording box had "sustained noticeable damage and the defense industry has been requested to help in reconstructing (it)."

"The reconstruction of the black box is supposed to take place first and then the reading," Hatami said.