The Department of Homeland Security alerted 128 flights that were then en route to the United States from Europe and told them to take security precautions, CNN's Jeanne Meserve reported.
Since 1998, their homeward route has been blocked by the security forces, following a ruling by the Parades Commission.
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Bhutto said streetlights on the route were not working, which hindered security guards.
The statement said only that the incident may have happened Wednesday while coalition, NATO-led forces and Afghan National Security Forces were on a route-clearance patrol in the Ghormach district and responded to an insurgent ambush.
Hundreds of troops lined the route to Caracas as a convoy of armoured security trucks escorted by military vehicles carried the bullion to the bank.
After a Canadian ambulance carrying a patient requiring emergency surgery was stopped en route to Detroit, Stockwell Day, the security minister, asked Michael Chertoff, his American counterpart, to review border procedures.
Air traffic control personnel "would have known immediately" of a crisis when the planes veered away from their normal route, according to Chris Yates, aviation security editor of Jane's Defence Weekly.
"International navies are the only ones capable of effective response against piracy in the region and can help to secure the safety and security of this major maritime trade route, " Mukundan said.
In October, when plans were being made to take the first group of Eritreans to Eritrea via the border near Bure in the north-east, the Eritrean Government said it could not guarantee the security of people travelling on that route.
Among these, your government has stated that the barrier being erected by Israel should be a security rather than political barrier, should be temporary rather than permanent, and therefore not prejudice any final status issues including final borders, and its route should take into account, consistent with security needs, its impact on Palestinians not engaged in terrorist activities.
But our correspondent says Pakistan acknowledges that the pipeline route through the troubled province of Balochistan presents significant security challenges.
This lets you impose the highest levels of corporate security and provides a fast-track route to restore any faulty devices and minimize downtime for key people, by completely wiping a lost or stolen device and rebuilding the replacement.
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In addition to the frontline duties in Helmand, since Christmas, B Company has been providing security for the rebuilding of the Highway 1 route, a road said to be vital to communications links across Afghanistan.
As a security precaution, the military refused to say what route the plane is taking or where it will stop.
Each extra photon represents a security risk, as it can be intercepted en route and the receiver would never know.
There is no ability to cordon off a whole marathon route and treat miles of urban streets with the degree of security at, say, a baseball stadium.
As an extra security measure, litter bins were also removed from the 42-kilometer route.
Constance would still be able to smell it later on, as she drove down the winding ramp for the last time, pulling away from the closing electric gate and the saluting security guard, onto the gritty ground floor and out into traffic, en route to .
The problem started to receive public attention in late March when security firms realised that the way Windows handles animated cursors could be used as a route to take over a PC.
Security was noticeably increased for this year's tour, with police officers posted along the route and a helicopter flying overhead.
WSJ: Security Tight for Bikers Through New York's Five Boroughs
Cyclist Mike Darville, from Frome, said he had used the route "two or three times a week" for the past five years but had been stopped by a security guard on Sunday.
Afghanistan is also thought to be seeking security guarantees to protect its porous borders, including the frontier with Pakistan that is the main infiltration route for insurgents who retain sanctuary in Pakistan's lawless tribal areas.
"It is an issue of grave concern that the explosive device was not detected by airport security in either Lagos (Nigeria) or Amsterdam (Netherlands), " which AbdulMutallab passed through en route to Detroit, Johnson said.
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