On Monday, four policemen were given six-year jail sentences for their roles in the blasts.
The provincial fire department, on its microblog, attributed the blasts to an ammonia leak.
Police said two people had been killed and 28 others were injured in the blasts.
FORBES: This post was last updated on Monday, April 15 at 5 PM ET.
CNN's Sheila MacVicar said the latest blasts displayed a change in tactics by Palestinian militants.
News of the two blasts led to condemnation from leaders and government officials across the world.
Wednesday's blasts came on the day India's new Home Minister, Sushilkumar Shinde, took up his post.
Timothy Jost, a law professor at Washington and Lee, blasts the Florida v.
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This may be forward-looking Helsinki, but within staggering distance are two atmospheric blasts from the past.
State police officer Roupen Bastajian had just finished the race when he heard the blasts.
BBC: Boston bombs: FBI probes deadly marathon 'terror' blasts
The blasts killed 8-year-old Martin Richard of Boston and 29-year-old Krystle Campbell of Medford.
"It felt like a huge cannon, " a witness told CNN about one of the blasts.
The Federal Aviation Administration placed a flight restriction over the site of the blasts.
The blasts sent workers running into the street, many in their nightclothes or underwear.
This water bazooka blasts targets up to 35 feet away with a massive burst of water.
At approximately 1:34, the camera shows Davis fidgeting with his synthesizer while playing trumpet blasts.
Obama has a new ad out in Indiana and North Carolina that blasts Clinton's proposal.
Interior Minister Vitaliy Zakharchenko and other government officials traveled to the city after the blasts occurred.
He blasts the Bosnian government for not lifting a finger to save the town.
Perhaps more importantly, anyone being driven batty by shrieking blasts of ultrasound they couldn't identify?
No one has claimed responsibility for the blasts, but suspicion will likely fall on the Pakistani Taliban.
Organizers were sending text-message blasts on Tuesday to remind subscribers of times and places for the marches.
The first victims began arriving at emergency rooms across the city within 10 minutes of the blasts.
The blasts were likely detonated by timers -- not by cell phones, a law enforcement official said.
CNN: Source: Bombs were likely in pressure cookers in backpacks
The Boston Globe website clustered video clips of the chaos following the blasts on a separate page.
Boston Police and the Federal Bureau of Investigation scrambled to figure out the cause of the blasts.
Seton Hall pushed the tickets to the Syracuse game at other home games and in email blasts.
WSJ: Seton Hall vs. Syracuse: An Open Hall With an Orange Twist
Amateur video footage and eye witness testimony suggested rocket attacks had hit weapons dumps, triggering dramatic orange-flamed blasts.
This one will let folks post real-time blasts about restaurants, shops and other businesses they love or hate.
The blasts in Amara struck a market and a place where labourers had gathered to look for work.
Or Christmas: I mean can mistletoe and tree lights really compete against bright multi-colored blasts in the sky?
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