The death toll is estimated at least 207 people.
The explosions resulted in the injuries of more than 500 others.
The explosions hit churches in the cities of of Colombo, Negombo, and Batticaloa.
The blasts also hit the Shangri-La, Cinnamon Grand and Kingsbury hotels in Colombo.
International news outlets said that authorities have arrested seven suspects in connection with the attacks.
The country’s Prime Minister Ranil Wickremesinghe denounced the attacks, calling on people to remain united and strong.
“I strongly condemn the cowardly attacks on our people today. I call upon all Sri Lankans during this tragic time to remain united and strong,” he said.
“The government is taking immediate steps to contain this situation,” he added.
After visiting the Shangri-La and St. Anthony’s Church, Sri Lanka’s Minister of Economic Reforms and Public Distribution, Harsha de Silva, commented on the attacks via Twitter saying, , “Horrible scenes. I saw many body parts strewn all over. Emergency crews are at all locations in full force.We took multiple casualties to hospital. Hopefully saved many lives.”
He added that several foreigners were among the victims of the explosions.
All Easter services and celebrations have been cancelled due to the explosions.