Baluchistan police Chief Moazzam Jai Ansari praised the response of security forces guarding the church, saying the attacker who made it inside was wounded and unable to reach the main building.
Meanwhile, SSP Operations said that two attackers were killed in the exchange of fire between the terrorists and security forces.
Jah said the venue - Bethel Memorial Methodist Church - was on high alert as Christian places of worship were often targeted by Islamist extremists over Christmas. The city has witnessed recent several attacks in the past two years.
The dead and the injured were shifted to Civil Hospital Quetta . The prayer hall's wooden door broke and fell on us.
According to the official statement of Health Ministry, an emergency has been declared in local public hospitals. "We had demanded the government beef up security for churches all over the country".
THIS is the moment a terrorist yanks up his cloak and reveals his Kalashnikov before unleashing a deadly gun and suicide bomb massacre at a Catholic church in Pakistan. About 60 people were also injured.
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Prime Minister Shahid Khaqan Abbasi strongly condemned the terrorist attack on a church in Quetta .
The has been the target of a terrorist attack in the past.
A man carries a boy as he walks out after gunmen attacked the Bethel Memorial Methodist Church in Quetta, Pakistan December 17, 2017.
ISIS quickly took credit for the blast, making it the first time the terror cell has claimed bombing a church in Pakistan.
On Saturday, Pakistan observed third anniversary of Peshawar school attack of 2014 which killed at least 150 people, mostly students.
Foreign Office spokesperson Muhammad Faisal condemned the terror attack, saying Pakistan's resolve against terrorism can not be deterred by these cowardly acts of terrorists.
Christians make up roughly 2% of Pakistan, which has some 198 million citizens.