The footage came to light on Monday showing Turkish security forces as they caught a suspect thought to be behind a deadly blast on Istanbul's Istiklal Avenue.

Istanbul police teams identified the female suspect based on her physical appearance, determined via images caught on security cameras near the site of the explosion that killed six people and injured 81 on the busy pedestrian street.

The suspect, whose escape route was also determined, was later detained in an overnight raid by anti-terror forces at a hideout in the district of Kucukcekmece, located west of the attack site.

Authorities uncovered that the suspect, whose initials are A.A., is a 23-year-old Syrian national who entered Türkiye through the Afrin area in northwestern Syria.

The images of her capture, recorded during the raid on the suspect's hideout, were also shared by police forces.

Heads of state and officials from around the world extended their condolences to the Turkish nation and condemned Sunday's terror attack on Istanbul's Istiklal Avenue that left at least six people dead and 81 injured, including two critically.

The bombing in Beyoglu, which took place around 4.20 p.m. local time (1320GMT), was carried out by the YPG/PKK terrorist organization, the Turkish government has confirmed.

Ahlam Albashir, a Syrian woman who confessed to planting the explosives in the crowded commercial hub, has been arrested along with dozens of other suspects.

"I have learned with deep anguish about the explosion at Istiklal Avenue in the heart of Istanbul," Pakistan's Prime Minister Shehbaz Sharif said on Twitter.

"(The) government and the people of Pakistan express deepest condolences to the brotherly people of Türkiye at the loss of precious lives and send prayers for the speedy recovery of the injured," he added.

Among other world leaders sent condolence messages and condemned the terror blast include HH Amir of Qatar, Azerbaijan's President, Swedish Prime Minister, Russia’s President; Ukrainian; Hungarian President; Serbian President; French President; Kosovo President; NATO chief;  EU foreign policy chief; European Commission President; European Council President; German President; and Italian Prime Minister.

The foreign ministries of Pakistan, Jordan, Egypt, Saudi Arabia, Germany, India, Bosnia and Herzegovina, and Greece also expressed condolences.

Separately, the Gulf Cooperation Council and the president of Bosnia and Herzegovina's Republika Srpska entity, Milorad Dodik, condemned the attack.

Senegal’s President and African Union Chair Macky; Burundi's President; Somali President; Congolese President; Kazakh President; Kyrgyz President; Dominican Republic President; Armenian Foreign Minister;

Ararat Mirzoyan, on Twitter, expressed his "sincere condolences" to the families of victims of the deadly explosion, and wished a speedy recovery to the injured. Ilhan Kyuchyuk, a Renew Europe group member of the European Parliament, Poland’s Foreign Minister; Panama’s Foreign Minister; Portugal’s Foreign Minister;  denounced the “horrific terrorist attack.

Condemnations and messages of sympathy also came from the foreign ministers of the Netherlands, Moldova, Romania, Slovakia, France, Latvia, Georgia, Uzbekistan, Albania, Bosnia, North Macedonia, and the Maldives.