At least three people were killed and 50 others wounded when a bomb explosion ripped through a Shiite Muslim procession in central Pakistan on Thursday, officials said.<br />''<br />''Security was high as the religious minority marked Ashura during the holy month of Muharram, a flashpoint for sectarian violence in previous years.<br />''<br />''A senior government official of Punjab province in the city of Bahawalnagar, confirmed the incident. Authorities have suspended mobile phone services in major cities as a security measure during Ashura processions. Residents in many urban centres were experiencing signal jams on Thursday. The streets leading to procession routes were also blocked.<br />''<br />''Ashura commemorates the killing of the Prophet Mohammed's grandson Hussain at the Battle of Karbala in 680 AD ' the defining moment of the religion's schism and the birth of Shiite Islam.<br />''<br />''<span style="color: #000000;">The procession later resumed and people continued with the ceremonies, the officials said.</span><br />