CHICAGO — You are now free to move about the cabin. Or not.

After a two-day security clampdown prompted by a thwarted attempt to bomb a jetliner, some airline officials told The Associated Press that the in-flight restrictions had been eased. And it was now up to captains on each flight to decide whether passengers can have blankets and other items on their laps or can move around during the final phase of flight.

Confused? So were scores of passengers who flew yesterday on one of the busiest travel days of the year. On some flights, passengers were told to keep their hands visible and not to listen to iPods. Even babies were frisked. But on other planes, security appeared no tighter than usual.

The Transportation Security Administration did little to explain the rules. And that inconsistency might well have been deliberate: What's confusing to passengers is also confusing to potential terrorists.

"It keeps them guessing," transportation expert Joseph Schwieterman said.

By not making public a point-by-point list of new security rules, federal officials also retain more flexibility, the DePaul University professor added, enabling them to target responses to certain airports or flights seen as more vulnerable.

"There was criticism after 9/11 that rules could be way too cookbook — not allowing authorities to adapt them to different settings, to different airports," Schwieterman said.

If the objective was to befuddle, then yesterday it was mission accomplished.

On one Air Canada flight from Toronto to New York's LaGuardia Airport, crew members told passengers before departure that they were not allowed to use any electronic devices — even iPods — and would not be able to access their personal belongings during the one-hour flight.

The questions came as President Obama ordered a review of air-safety regulations. TSA spokeswoman Sterling Payne declined to offer details other than to say the agency would "continually review and update these measures to ensure the highest level of security."

An hour before a US Air flight from Manchester, England, to Philadelphia landed, flight attendants removed passengers' blankets and told them to keep their "hands visible," said passenger Walt Swanson of Cumbria, England.

Even bathroom visits were affected on some flights.

On Continental Flight 1788 from Cancun, Mexico, to Newark, N.J., three airport security agents frisked everyone at the gate, including babies, prompting one to scream loudly in protest. On the plane, crew announced that the toilets would be shut down the last hour of the flight and passengers would not be able eat, drink or use electronic devices.