Shahzad also has a brother named Amir who lives in Canada, a police source said.
Appeals by Amir, 18, and Butt, 26, will be heard in Dubai next weekend.
Jebel Amir local commissioner Haroun al-Hassan on Thursday put the death toll at 60.
CNN's Joe Vaccarello, Ivan Watson, Amir Ahmed and Joe Sterling contributed to this report.
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One man who knows exactly how transformative the Olympics can be is the boxer Amir Khan.
CNN's Nima Elbagir in Nairobi, Kenya and Amir Ahmed in Atlanta contributed to this story.
Journalist Mohamed Fadel Fahmy and CNN's Amir Ahmed and Saad Abedine contributed to this report.
CNN's Amir Ahmed, Joe Vaccarello, Ivan Watson, Hamdi Alkhshali and Moni Basu contributed to this report.
Amir will have another fight in June but they won't have it sorted out by then.
CNN's Richard Roth, Chelsea Carter, Amir Ahmed and Barbara Starr contributed to this report.
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Pakistan trio Salman Butt, Mohammad Asif and Mohammad Amir have already given police statements.
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At first glance, the Band-e-Amir lakes hurt the eyes in the most amazing fashion.
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Amir does not have to pay for antiretroviral drugs, which Iran's government provides for free.
CNN's Amir Ahmed, David McKenzie, Faith Karimi and Jamie Crawford contributed to this report.
Amir's lawyer Henry Blaxland argued for a suspended sentence that would allow his immediate release.
Amir would have remained in the UK to carry out any community service, Mr Blaxland added.
CNN's Amir Ahmed, Tracy Doueiry and Joe Sterling in Atlanta contributed to this report.
Mr. Amir "changed history, " says a grim-faced Carmi Gillon, the agency's leader at the time.
Associated Press reporters Yu Bing in Beijing and Amir Shah in Kabul contributed to this story.
CNN's Amir Ahmed, Arwa Damon, Jill Dougherty and Josh Levs contributed to this report.
CNN: Syria says it will allow U.N. to deliver humanitarian aid
Dr Amir Hannan said using an online system had helped rebuild trust at his Hyde surgery.
Diamandis pounced and got a meeting with Ansari, her husband, Hamid, and his brother Amir.
The 40m (131ft) deep well at the Jebel Amir mine in North Darfur caved in on Monday.
Tazhayakov's father, Amir Ismagulov, told CNN he met with his son for about 40 minutes last week.
CNN's Amir Ahmed, Yousuf Basil and Hamdi Alkhshali and journalist Mohamed Fadel Fahmy contributed to this report.
CNN's Mohamed Fadel Fahmy, Arwa Damon, Amir Ahmed, Hamdi Alkhshali and Joe Sterling contributed to this report.
Match-fixing is considered a more serious charge than the spot-fixing claims faced by Butt, Asif and Amir.
BBC: Pakistan batsman Yasir Hameed hits out at tabloid sting
Cook's clash with Arthur is on the same bill as Amir Khan's match with Colombian Breidis Prescott.
Some, such as Amir Mohebbiyan, a conservative columnist for Resalat, say there is no crisis of legitimacy.
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