Jordanian police said on Saturday investigations showed a home made explosive device planted near a police van was behind a blast that killed one policeman and injured six others the day before.
Police said on Friday a gas canister stored in the van was behind the blast near a gendarmerie parking lot close to the site of a music festival in the town of Fuheis outside Amman.
"This cowardly act will only increase the determination to do our job to protect people," the interior ministry statement said.
Such incidents are rare, but radical Islamists have long targeted Jordan, a tightly policed country that is also a staunch regional ally of the United States and signed a peace treaty with Israel.
The BIST name and logo are protected under the "Protected Trademark Certificate" and cannot be used, quoted, or altered without permission.All rights to the information disclosed under the BIST name are entirely owned by BIST and cannot be republished. Market data is provided by iDealdata Financial Technologies Inc. BIST stock data is delayed by 15 minutes.