20 people, including a senior army officer, were killed on Wednesday when two blasts were detonated by separate suicide bombers in southwest Pakistan

At least 20 people, including a senior army officer, were killed on Wednesday when two blasts were detonated by separate suicide bombers in southwest Pakistan, police officials said.

The attackers targeted the Frontier Corps, a paramilitary force commanded by army officers, stationed in Quetta. At least 30 people were injured in the explosions.

There was no immediate claim of responsibility but suspicion immediately fell on Al Qaeda and Taliban militants . On Monday, Pakistani officials announced the arrest of a senior Al Qaeda leader, Younis al-Mauritani from Quetta. The operation was conducted by Inter-Services Intelligence, the country’s intelligence organization, and the Frontier Corps, according to an army spokesman.

The attack Wednesday morning in Quetta took place in a high-security neighborhood where several government offices and residences of high-ranking government officials are located.

The attackers targeted the house of Brig. Farrukh Shehzad, the deputy inspector general of the Frontier Corps. One bomber detonated his vehicle outside the house of the officer, a witness told AAJ TV, a private television news channel.

Soon after the first attack, another attacker entered the house on foot and started firing before detonating his explosives. Brigadier Shehzad was wounded and his wife was killed, according to initial local news reports. A colonel, Khalid Masood, was also killed in the attack.

Local television networks broadcast images of charred vehicles as ambulances ferried the wounded to nearby hospitals. The house of the wounded brigadier was badly damaged.

Quetta, the capital of Baluchistan Province, which borders Afghanistan and Iran, has a history of sectarian and nationalist violence. Al Qaeda leaders and Taliban militants are also thought to have found a safe haven in the city and the province