(CNN) -- Packets of white powder that sent a scare through the offices of Alaska's congressional delegation Monday turned out to be powder used for making concrete.
The FBI has determined there was no threat and no criminal intent, according to Julie Hasquet, press secretary for U.S. Sen. Mark Begich. The man who mailed the packages told the FBI he was sending a sample of concrete material to each of the lawmakers, she said.
It was unclear if the samples had been requested.
The packages were sent to the Fairbanks offices of Sens. Lisa Murkowski and Begich, and the Anchorage office of Rep. Don Young, police said.
The powdery surprise put a scare into authorities as a hazardous materials team was called to Young's office.
"It was one of those situations where we react according to a prescribed plan and we followed the plan," said Lt. Dave Parker of the Anchorage Police Department.
CNN's Kate Bolduan contributed to this report.