Washington, Feb 20: The former acting mayor of Falluja and two US-trained Iraqi civil defense workers are being held on suspicion of involvement in devastating insurgent raids in the Iraqi town last weekend, the Pentagon said. At least 27 Iraqis died and 35 people were wounded in last Saturday's well co-ordinated attacks on a police station and civil defense headquarters in the restive town west of Baghdad. Pentagon spokesman Lawrence di Rita and army Brig. Gen. David Rodriguez told reporters at a briefing that the former acting mayor and two civil defense corps workers were among Iraqis being questioned in connection with the incident. ''The mayor was suspected, just based on the situation. And the people on the ground determined that they thought he might have something to do with it. So they detained him and we're interrogating him and trying to get to the bottom of it,'' said Rodriguez, Deputy Director of the US Military's Joint Staff. The United States has trained and fielded more than 200,000 Iraqi security personnel. Di Rita said two civil defense corps workers were detained, adding, ''So they were obviously vetted and were able to slip through somehow.'' Rodriguez said US Forces were conducting background checks ''the best we can'' on Iraqis being trained for security jobs. ''But we're not sure we'll ever get that to the perfect level,'' the General said. Di Rita said one of the attackers who was killed was confirmed to be a former Iraqi army major. ''We have detained the mayor. Several people have been detained. But we have not got to the bottom of that. And we continue to do the interrogations and search for the answers on who was actually behind it,'' di Rita added. Bureau Report