ISLAMABAD: Pakistan Peoples Party  chairman Bilawal Bhutto Zardari returned to Karachi from Dubai and was scheduled to address party rallies through video conferencing due to security  threats,  top party sources told Dawn.com on Friday. "Bilawal travels frequently between Dubai and Karachi and we do not share his travel plans", chief of staff to Bilawal Bhutto Zardari, Hisham Sheikh told Dawn.com.

Hisham added that "Federal Intelligence Agency (FIA) had informed us in writing about serious security threats posed to the life of Bilawal Bhutto Zardari and we have taken measures accordingly."

Presidential spokesman Farhatullah Babar also admitted that there were serious  security threats to the party's top leadership and candidates but made it clear that the PPP did not want any delay in the polls.

He said party candidates have been directed to immediately  inform government in case of  security threats by terrorists.

Senior leader of Pakistan Peoples Party (Parliamentarians) Makhdoom Amin Faheem told Dawn.com that the party would use social media, SMS texts, personal contacts and very limited corner meetings due to security concerns.