Young children have been prevented from boarding aircraft in the US because they have names similar to those on a government no-fly list, reports say.
Ingrid Sanden's daughter was stopped last November
AP news agency cited two cases of children under the age of two stopped after their parents were told they were on the list of terrorism suspects.
Critics say the government's failure to provide data on the suspects has meant innocent people are often targeted.
The lists have grown significantly since the 11 September 2001 attacks.
The no-fly list, along with a similar list of passengers who require additional screening before boarding planes, is thought to contain thousands of names.
Airlines are required to check passenger lists against the suspect lists.
'More focus needed'
Human rights group the American Civil Liberties Union (ACLU) says innocent passengers with names the same or similar to suspects have been subjected to interrogations, enhanced searches, delays and detention.
It now appears toddlers are among those raising suspicion.
Ingrid Sanden told AP that her one-year-old daughter was stopped in Phoenix while trying to board a flight to Washington last November.
"I completely understand the war on terrorism, and I completely understand people wanting to be safe when they fly," she said. "But focusing the target a little bit is probably a better use of resources."
Another woman, Sarah Zapolsky, told the agency that she and her husband were stopped at Washington's Dulles airport after an airline agent told them their 11-month-old son was on the list.
They were only allowed to board after their son's passport details were faxed through by a travel agent.