Lahore, Pakistan (CNN) -- Pakistani authorities said they arrested 12 people in connection with suicide bomb attacks that killed 50 people and injured more than 200 at a Lahore shrine last week.
Ammunition and weapons were recovered during the arrests in two neighborhoods in Lahore, police said.
Officials planned to hold an emergency security meeting Monday to discuss ways to counter militant attacks. Pakistani Prime Minister Syed Yusuf Raza Gilani called for the meeting Saturday, saying the country cannot afford the "brunt of terrorism".
As public outrage grows, police and politicians are under a large amount of pressure to show results after the deadly blasts that occurred when a pair of suicide bombers detonated their explosive vests outside the Data Darbar, a famous Sufi shrine complex.
One of the bombs detonated in the shrine's courtyard, while the other exploded on the shrine's lower level, police said.
Pakistan's Punjab province, of which Lahore is the capital, has been the scene of carnage in recent weeks, including a bloody attack on a hospital and another targeting Ahmadis.
On Friday, angry Pakistanis -- some wielding guns for revenge -- took to the streets of Lahore in protest. Many are troubled by the spread of bloodshed from the Afghan border areas to the heartland.
They are also concerned that Muslims are attacking Islamic holy sites. Sunni and Shiites do not consider the Ahmadis as a part of Islam because they do not regard Mohammed as the last prophet sent by God. As such, they have been targeted by Islamic extremists.
Thursday's attack was at a revered Sufi shrine. Sufism is an ancient, mystical form of Islam that is generally more tolerant.
The Human Rights Commission of Pakistan expressed alarm over the attacks and called on both the government and Muslim clerics to stand up to extremism.
