The death toll in Brussels terror attacks rose to 34, with 20 killed in subway bombings and another 14 in airport blasts, reports Belgian broadcaster VRT.

Citing unofficial data, RTBF broadcaster reports 34 people killed in the terror attacks.

Two explosions were reported to have occurred at Brussels’ Zaventem airport at 8 a.m. local time on March 22.

Two more explosions were reported at the city's two subway stations, outside EU institutions and near a neighborhood where emigrants reside.

The Belgian government has officially recognized the attacks, which claimed the lives of 23 people, acts of terrorism.

The attacks might have been retaliation for a March 18 arrest of Salakh Abdesalam, a man suspected of masterminding terror attacks in Paris.

Some reports suggest ISIS has claimed responsibility for the terror attacks in Brussels. The terrorists revealed no details of the terror attacks, saying only they would continue their attacks on countries of the EU.