Family of Carlos Wilcox has asked for his photo not be released. Related stories:  US Military in Iraq says 3 Soldiers Killed  Red Bull Infantry heads to Iraq

5 EYEWITNESS NEWS has learned a fourth national guard soldier was injured in the attack that killed specialists Danny Drevnick, 22, Woodbury, James Wertish, 20, Olivia, and Carlos Wilcox, 27, Cottage Grove when insurgents attacked their unit in Basra.

ABC News says the three soldiers were killed from a missile strike in their compound at their base outside Iraq's second largest city around 9:15 p.m. Thursday.

The fourth soldier's family has been notified, but no other details have been released. All four of the soldiers belong to the 34th Infantry Red Bull Division based in Stillwater.

Minnesota Senator Amy Klobuchar released a statement on the soldiers' deaths, saying, "They made the ultimate sacrifice for our nation, and for that we are forever grateful...As we mourn their loss, let us also pay tribute to all of our soldiers who carry out their duties in the face of danger on a daily basis."

The Yellow Ribbon Network of Washington County is holding a silent vigil in honor of the three fallen soldiers on Sunday at 6 p.m. at the Stillwater Veterans Memorial. The vigil will also honor all deployed service members and their families.

"Our hearts are broken over the loss of these fine young people. The Red Bulls are a deeply rooted part of our community," said State Rep. Phil Sterner of Rosemount.

Wilcox's friends and family say he worked as a security officer at The Ugly Mug in downtown Minneapolis. Friends gathered at the bar Friday to remember him.

"My son loved his country, and he died an honorable death," said his mother Charlene Wilcox.

Drevnick's family tells 5 EYEWITNESS NEWS their son had just been home on leave for two weeks and returned to Iraq on July 8. His father says Drevnick had dreams of becoming a State Trooper.

"Three Multi-National Division-South Soldiers were killed when Contingency Operating Base Basra was attacked by indirect fire," the U.S. military said, referring to a mortar or rocket attack.

Two Iraqis were killed, and at least two dozen others were injured in bombings in Baghdad as huge crowds of pilgrims gathered to commemorate a revered Shiite saint. In Karmah, about 50 miles west of the capital, the daughter and granddaughter of a police officer died in a bombing at his home.

The security situation in Iraq has improved dramatically in the last two years, though militants still carry out lethal attacks on a regular basis.

Last year, Iraqi forces, with U.S. support, routed Shiite militias from their strongholds in Basra.

Col. Butch Kievenaar, the top U.S. military commander in southern Iraq, said in a Defense Department briefing earlier this week that some Iraqi extremists who had gone to Iran have returned to the Basra region.

He said he believed they were pursuing criminal activities such as extortion, and there had been no clear sign that they had a "militia" agenda.

He said some groups were still receiving support from Iran, but "most of the individuals that we see or deal with on a daily basis" are no longer receiving the same level of backing from the Iranians as in the past.