At least five policemen were killed and seven others injured in a suicide attack in Pakistan's southwestern city of Quetta on Tuesday, a statement from the army's Inter-Services Public Relations (ISPR) said.
The road leading to the provincial capital's airport and businesses in the area remained closed on Wednesday as security forces continued to collect evidence after three bomb attacks rocked the city a day earlier.
"We learned with deep sorrow that as a result of terrorist attacks perpetrated in Quetta, capital of the Balochistan province, Pakistani security officials were martyred and wounded", the ministry said in a statement.
"The first suicide bomber blew himself up outside a FC checkpost in the outskirts of Quetta city after he was spotted by the guards", Balochistan Home Secretary Ghulam Ali Baloch told AFP.
He said the troops had opened fire at the attackers, who detonated their explosives, wounding eight soldiers.
No group has claimed responsibility for the attack yet.
Islamist militants with ties to the Taliban, al Qaeda and ISIS are known to operate in the province, Reuters reported. It also has an indigenous ethnic Baloch insurgency fighting the central government. Its followers have claimed some of Pakistan's most deadly recent attacks. Militants have also stepped up attacks on Christian and Shia Hazaras, both minority communities in Quetta. A suicide attack in Lahore killed at least 14 people in March 2015, and suicide attacks on a church in Peshawar in 2013 killed more than 80 people.