At least 24 people are dead after suicide bombers struck a seven-story police headquarters and a house in Lahore, Pakistan on Tuesday.
The two blasts, which occurred about 15 minutes apart, also wounded at least 200 people.
"The first blast took place outside the Federal Investigation Agency's offices in Lahore," ABC's Gretchen Peters told CTV's Canada AM on Tuesday from Islamabad. "It blew off the entire facade of the multi-story tower."
Twenty-one people were killed, including 16 police officers, officials said.
Authorities say the damage could have been caused by an explosive-packed car driven into the building or by a bomb planted in an elevator, said Peters.
"Many expect the death toll will rise," she said.
The FIA is equivalent to the FBI in the United States and its agents have investigated prior terrorist attacks in Pakistan.
In the second attack, a suicide bomber drove a van into an advertising agency at a house about 25 kilometres from the FIA, reports The Associated Press.
Mohammed Afzal, a city police official, said three people were killed in the second blast -- including two children of a gardener.
"They believe the target of that attack was Asif Ali Zardari -- the husband of the late... Benazir Bhutto," said Peters.
Bhutto's party swept Feb. 18 elections with Zardari at the helm, following Bhutto's assassination in December.
Since the elections, there have been at least seven suicide blasts in Pakistan.
Officials are blaming the Taliban and al Qaeda-linked militants for both attacks.
Also Tuesday, Australia announced it was postponing its international cricket tour to Pakistan due to security concerns.
With files from The Associated Press
