Ukrainian investigators say they want to search Russian-made missile remains at the scene of the plane crash near Tehran • Iran still refuses to move the black box

• Scene of "Ukraine Airlines" plane near Tehran // Photo: IP

Ukrainian investigators are looking for Russian missile remains at the scene of a plane crash of Ukraine Airlines, which crashed shortly after takeoff near Tehran, the capital of Iran.

Oleksiy Danilov, secretary of the General Security Council of Ukraine, told Reuters that investigators are investigating several theories, one of which was that the plane was hit by an anti-aircraft missile.

Earlier, Ukrainian President Vladimir Zelinsky made a statement on television in his country today, claiming that his government was considering several options that could have caused the crash of a passenger plane in Iran last night.

More on:

Suspicion: Iran dropped the Ukrainian plane

The Ukrainian plane crash: Iran refuses to deliver the black box

The Iranians have shown that they fear the United States

The Ukraine Airlines' Boeing 737 aircraft reportedly crashed shortly after takeoff, leading to the deaths of 176 people from seven countries. Among those killed were 82 Iranian citizens, 63 Canadian, 11 Ukrainians, ten Swedes, three Germans and three British.

In a televised statement made by President Zalinsky, he declared it January 9 today as a national one. In addition, he asked the people not to succumb to manipulations, speculation, conspiracy theories and reckless assessments when it comes to the plane crash in Tehran.

"Undoubtedly, the first priority for Ukraine is to identify the reasons that led to the plane crash," Zalinsky said, adding that "we will certainly find the truth, for this purpose, a thorough and independent investigation will be conducted in accordance with international law."

Ukrainian President Vladimir Zelinsky lays flowers in memory of those killed in disaster // Photo: IP

Meanwhile, an internal report by Iranian investigators on behalf of Iran's Civil Aviation Organization was released today claiming the plane caught fire immediately before it crashed southwest of Iran's capital, Tehran. The report is based, in part, on eyewitness quotes that floated from the area as it caught fire before it crashed.

The Ukraine Airlines Boeing aircraft is 3 years old, and its last maintenance treatment was on January 6, just two days before the accident. The report states that the plane encountered a technical glitch shortly after takeoff, and even began to approach a nearby airport before it crashed.

Ukrainian plane crash site // Photo: IP

The technical problem was not described in the report, though a Canadian security official told Reuters that there was evidence that one of the jet's jet engines overheated before it crashed.

Meanwhile, the Al-Arabiya network reported a particularly puzzling Iranian message that the black box of the crashed plane was found, but they do not intend to hand it over to the US airline or Boeing for investigation.

Yesterday, CNN reported that US intelligence agencies had launched an investigation into the plane's crash, suspecting the plane crash was not an accident. The main suspicion is that Iran's defense systems intercepted the passenger plane by mistake, in the wake of recent security tensions in the region, between Tehran and Washington.