An investigation is underway into the crash of a fighter jet into a block of flats in Yeysk, Russia on Monday, killing 13 people including three children.

Dramatic videos and images have surfaced across social media, allowing us to try to piece together what happened.

What do we know?

On Monday evening, an Su-34 fighter-bomber crashed into a residential building in the Russian city of Yeysk, more than 100 miles (160km) from Ukrainian held territory.

The Russian defence ministry has suggested that a malfunction in one of the engines was the the most likely cause.

Videos on social media showed a large fire and smoke billowing out of a high-rise block.

Several of these have been verified by the BBC to confirm the north side of a nine-storey block just off a main road in Yeysk had been hit.

In the videos, the same landmarks and buildings can be seen. We cross referenced these with Google stree view images to confirm the crash happened just off the Ulitsa Kommunisticheskaya dual carriageway in the south of Yeysk.

The weather also matched in each video, with clear skies and the sun setting, so we can be confident that the crash happened about 17:30 local time.

The Russian Defence Ministry has said the Su-34 crashed after taking off for a training flight from a military airfield near Yeysk.

The Su-34 is a fighter bomber operated by two pilots which is often deployed to hit ground targets.

"Su-34s are one of Russia's more advanced aircraft but it still has problems that have manifested, particularly in training," says J Andrés Gannon, a security expert at the US Council on Foreign Relations (CFR).

There have been two other cases of Su-34s crashing this year that were unrelated to enemy fire, according to Air Forces Monthly, a UK publication that tracks military aircraft data.

How did it happen?

CCTV footage from a major road near to the block was later posted on Telegram and Twitter.

It showed an aircraft descending, a flash which could have been some sort of initial explosion or fire on board, and then a much larger explosion as the plane hit the building.

The plane appears to be flying in from the west, possibly from the Yeysk airport on the outskirts of the city which has a military airfield.

In video of the fire after impact, crackling sounds and some small bangs can be heard.

These could have been caused by ammunition which was being carried by the plane during training exercising igniting.

Russian officials say the fire was caused by a fuel spill and insist that there were no explosions of ammunition.

"If there was something like that, then exactly half of the house would have been destroyed," said the local governor.

This still also appeared on Telegram:

It shows a pilot with a parachute in the top right, who appears to have ejected from the plane before it crashed.

We are carrying out further investigations to confirm the authenticity of this image.