World Bulletin/News Desk
An explosive device blew up inside a truck parked outside the town hall of Mexico's northern city of Nuevo Laredo on Friday, injuring seven people but causing no casualties, officials said.
The blast comes two days before Mexico votes for a new president to replace Felipe Calderon, who has waged a 5-1/2-year battle against drug traffickers.
Police did not immediately confirm whether the attack was drug-related but Mexican cartels have been increasingly using improvised explosive devices in cars. Most are relatively small compared to the car bombs used in conflict zones such as Iraq.
The explosion went off mid-morning, tearing apart the vehicle and damaging 11 other cars as well as a wall of the town hall, the Tamaulipas state attorney general's office said in a statement.
Soldiers, marines and police sealed off the scene and were taking evidence to determine the type of explosive material used, the release said.
Staff from the town hall immediately evacuated the building and the emergency services were on alert for other blasts.
Nuevo Laredo, across the Rio Grande from Laredo Texas, has been a hotpot for drug related violence as the Zetas cartel battles rivals for control of billion dollar narcotics trafficking routes to the United States.
More than 55,000 people have died in drug-related violence since Calderon took office in late 2006.
Mexican presidents are barred by the constitution from running for a second term, but the candidate from Calderon's ruling National Action Party (PAN) is in third place, according to most polls.
Enrique Pena Nieto, of the opposition Institutional Revolutionary Party (PRI), is expected to win the election by a wide margin according to the polls.
About 3,000 'economic migrants' wait on Greek border as Macedonia restrict entry to refugees from warzones only
European Council President Donald Tusk says top priority is to protect bloc's external borders
Tight security surrounds Pope Francis' visit to conflict-hit country
Jeremy Corbyn says UK government has no 'follow-up' plan for Syria but opposition Labour Party remains divided
Various polls show Spaniards divided if the country should join bombing ISIL
Earlier Berlin offered France Tornado reconnaissance jets, a naval frigate, aerial refuelling and satellite images in the fight against the ISIL group
Pentagon says Russia does not share flight information with U.S.-led coaliton in Syria
Two UN peacekeepers and two civilians died in ambush claimed by Ansar-ud Din insurgents
Turkish Embassy calls on Russian authorities to cease targeting Turkish citizens
Protestors across UK call on government not to repeat 'mistake' of Iraq war
Activists urge South African government to reduce carbon emissions ahead of COP21 in Paris
Sanctions include ban on Turkish goods and suspension of visa-free regime for Turkish nationals
The army in Macedonia has begun erecting a metal fence on Saturday on the country's southern border with Greece
Kenyan police have accused two Iranian trained suspects of planning attacks on schools and foreigners in Nairobi
Israel has been using Dutch dogs to terrorize Palestinian civilians - including children - and have been exporting them from the Netherlands for the past 20 years.