A series of national media reports indicates that investigators tracking down the suspect, or suspects, behind Saturday's failed car bombing in Times Square believe the case could have an international component.

The Washington Post started the reporting by citing Obama administration officials saying it "increasingly appears to have been coordinated by more than one person in a plot with international links."

ABC and Fox News each issued similar reports. ABC reports that one suspect may be a Pakistani-American, citing an official who said "This is moving very fast because they left behind a treasure trove of evidence in the unexploded car."

Police credit a T-shirt vendor who noticed smoke coming out of a Nissan Pathfinder with alerting them to the attempted attack. Despite efforts to conceal the Pathfinder's ownership history, police already have traced its previous owner and the Connecticut junkyard where its license plate was taken from.

Fox said officials were looking at similarities between this failed attack and an attack on the Glasgow, Scotland airport and the attempted bombing of a London night spot in 2007 because they also involved bombs made with propane and gasoline like the Times Square bomb.

That doesn't mean it's tied to known terrorist organizations like Al Qaeda or a Pakistani Taliban group which issued a threatening taped message after the failed attack. In an online Post chat, terrorism analyst Evan Kohlmann said plots from established groups tend to be more sophisticated:

"based on the amateurish construction of the device and the fact that it does not appear to be part of a coordinated campaign of attacks, it seems unlikely that an organized terror group was responsible. However, given the flurry of claims from the Pakistani Taliban over the past few days -- including a video last night of Hakimullah Mehsud vowing to carry out imminent attacks on U.S. cities -- it may be premature to rule out that possibility entirely."

Reports indicate that investigators found large amounts of fertilizer in the Pathfinder containing the bomb, but not the kind of fertilizer that explodes.