The arch at Wembley Stadium was illuminated in the colors of the Turkish flag Sunday to show solidarity with Turkey in the wake of a deadly terror attack in Istanbul on Saturday night.

"Wembley's arch is red tonight as a mark of respect and sympathy following the attacks outside Besiktas' stadium in Turkey yesterday," the English Football Association said on its official Twitter account.

Istanbul was rocked by twin blasts Saturday night. Here is what we know so far about the terror attacks.

Two bombs exploded in a terrorist attack in central Istanbul, close to Maçka Park. One of the explosions was due to a suicide bomber and the other was a car packed with explosives.

The attacks left 38 people dead and 155 wounded. 14 of the wounded are currently under intensive care.

A day later, the terror attacks were claimed by PKK's suicide team, the Kurdistan Freedom Hawks (TAK).

TAK said that two of their members died in the attacks, but they did not specify if they were suicide attackers, adding that they will release the information of the attackers in upcoming days.

Intelligence sources indicated that the suicide bomber was from a PYD-controlled area in Northern Syria. The PYD is the Syrian branch of the PKK terrorist group.

The People's Protection Units (YPG), which is the military wing of the PYD, had previously threatened Turkey with terror attacks with a video released in February this year where the group declared war on Turkey.

Both the PYD and the YPG are the offshoot of the PKK terrorist organization operating in Syria. The militants often receive training in Syria in YPG positions and travel to Turkey to carry out attacks for TAK or PKK, both groups share organic ties with the PYD/YPG.