Jacinda Ardern condemns horrific Sri Lanka bombings as 'devastating'

New Zealand Prime Minister Jacinda Ardern has condemned a horrific series of bombings in Sri Lanka as "devastating", highlighting the issue of terrorism in the wake of the Christchurch attack.

At least 185 people have been killed, 35 of them foreigners, in a series of attacks targeting churches and hotels on Easter Sunday.

Hundreds of other people have been injured and rushed to hospital, with local police warning the death toll is still expected to rise.

On Sunday night, Ardern issued a statement sending her condolences to Sri Lanka.

"New Zealand condemns all acts of terrorism, and our resolve has only been strengthened by the attack on our soil on the 15th of March," she said.

"To see an attack in Sri Lanka while people were in churches and at hotels is devastating."

While the Christchurch attack targeted mosques, the Sri Lanka bombs targeted Christian churches and people gathered in hotel restaurants during the Easter Sunday mass.

"New Zealand rejects all forms of extremism and stands for freedom of religion and the right to worship safely. Collectively we must find the will and the answers to end such violence."

Sri Lanka's Prime Minister Ranil Wickremesinghe had sent his own statement of support to New Zealand after the Christchurch attacks.

It was his last tweet before the bombings on Sunday.

Now, he's called for his country to remain 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.

"Please avoid propagating unverified reports and speculation. The government is taking immediate steps to contain this situation."

Eight blasts have been reported - six police describe as simultaneous, and two more hours later.