While law authorities have widened the scope of the investigation into Wednesday's attack on a bus carrying Shia Ismailis in Karachi, Sindh Rangers have nabbed 145 suspects in relation to the massacre.
A spokesperson for the paramilitary force said on Thursday that operations had been conducted in Sohrab Goth, Gulshan-i-Iqbal, Orangi Town and other areas and those arrested included alleged target killers and members of banned outfits reported the Dawn.
The identities of the suspects were however, not revealed.
The news came after death toll rose from the incident to 45 as two injured people died on Thursday.
Meanwhile, police is recording the statements of two new eyewitnesses and decided to go through the list of suspected militants released from jails recently, officials said.