Pope Francis and the head of the World Council of Churches have both strongly condemned the blind violence in two terror attacks in Brussels that killed at least 34 people and left around 200 injured.

Soon after the blasts during the early morning rush in the Belgian capital, the Pope in a telegram signed by Vatican Secretary of State, Cardinal Pietro Parolin, prayed for the victims, the injured and their families.

He again condemned "blind violence which causes so much suffering" after two bomb attacks at the international airport in Brussels and a later bomb at a subway station.

"The Holy Father again condemns the blind violence which causes so much suffering and imploring from God the gift of peace, he entrusts on the bereaved families and the Belgians the benefit of divine blessings," said the cardinal.

The World Council of Churches general secretary, Rev. Olav Fykse Tveit, strongly condemned the series of lethal terror attacks carried out in Brussels as "wicked and indiscriminate," calling for prayers for those affected.

More than 34 people were killed and more than 200 injured in the March 22 attacks at Brussels Zaventem international airport and a city metro station near buildings belonging to the European Union and the Ecumenical Centre in Brussels.

""I grieve such a wicked and indiscriminate attacks on ordinary human beings has taken place in Brussels, in a way that suggests a deliberate targeting of the heart of Europe," said Tveit. in a statement.

He noted, "Apart from the loss and suffering this act of violence has directly caused, it creates wider tensions.

These "make it more difficult for Europe and Europeans to play the constructive role they need to in support of those who are seeking to escape the ongoing agony which is being experienced in several parts of the Middle East."

The WCC encouraged prayer for and solidarity with the victims and those close to them.