In a letter to Obama adminstration officials on Thursday, Sens. Jeff Sessions and Ted Cruz demanded the release of detailed records pertaining to the immigration status of the couple who killed 14 people in San Bernardino.

"You have failed to comply with the [original] request [for immigration history of 72 recent terrorists] sent more than three-and-half months ago. A response is not only long overdue, but urgent in light of a series of assaults...and Congress' imminent consideration of government funding legislation that would include funding for myriad immigration programs that have allowed for these events to occur," the letter states.

Syed Farook, 28, was born in Chicago on June 14, 1987, to parents born in Pakistan. He was raised in Southern California.

His wife, Tashfeen Malik, was Pakastani.

Malik arrived on a K-1 visa for fiancees and with a Pakistani passport in July 2014, authorities said.

The two were married on Aug. 16, 2014, in nearby Riverside County, according to their marriage license. Both listed their religion as Muslim. The couple had a 6-month-old daughter who they dropped with relatives Wednesday morning before the shooting.

Farhan Khan, Farook's brother-in-law, told NBC News that he had started the legal process to adopt the girl. He described Farook as a 'bad person,' but said he was not radical.

"Farook is the child of immigrants who came to the United States from Pakistan, and Malik [his wife, a native of Pakistan] travelled to the U.S. from Saudi Arabia," the letter states, citing press reports.

"We are dealing with an enemy that has shown it is not only capable of bypassing U.S. screening but of recruiting and radicalizing Muslim migrants after their entry to the United States. The recruitment of terrorists in the U.S. is not limited to adult migrants, but to their young children and to their U.S.-born children - which is why family immigration history is necessary to understand the nature of the threat."

The entire letter is below:

"Dear Attorney General Lynch, Secretary Johnson, and Secretary Kerry:

On August 12, we sent a letter requesting that you provide basic information regarding the immigration histories of 72 individuals in the United States who have been identified as having a connection to terrorism over a one-year period. You have failed to comply with the request, sent more than three-and-half months ago.

A response is not only long overdue, but urgent in light of a series of assaults, including: the heinous attacks in San Bernardino, California, the earlier attacks on the military recruiting center in Chattanooga, the Boston Bombing, and Congress' imminent consideration of government funding legislation that would include funding for myriad immigration programs that have allowed for these events to occur.

Press reports indicate that the alleged perpetrators of yesterday's attacks, Syed Rizwan Farook and his new wife Tashfeen Malik, wore "assault style clothing," described as "tactical gear," and authorities described their home as an "IED factory," with multiple pipe bombs and small explosives strapped to remote-controlled cars. According to these press reports, Farook is the child of immigrants who came to the United States from Pakistan, and Malik travelled to the U.S. from Saudi Arabia. According to the LA times: "Farook recently traveled to Saudi Arabia and returned with a new wife he had met online." A CNN report added the following detail: "Farook traveled to Saudi Arabia for several weeks in 2013 on the Hajj, the annual pilgrimage to Mecca that Muslims are required to take at least once in their lifetime, which didn't raise red flags, said two government officials. It was during this trip that he met Malik, a native of Pakistan who came to the United States on a 'fiancee visa' and later became a lawful permanent resident." Among Muslim nations, Pakistan is the top recipient of U.S. green cards, having received 83,000 between FY09-FY13. Further, according to CBS News, sources say that the two viewed ISIS propaganda online, and separate reports indicate that Farook was in touch with other individuals being investigated for terrorism.

Accordingly, in addition to the previously requested information from our August 12th letter, we demand that you immediately provide the same detailed information requested in that letter for Farook and Malik, which would include the immigration history of their parents and any immigration documents related to their marriage and her subsequent travel to the U.S.

In our struggle against terrorism, we are dealing with an enemy that has shown it is not only capable of bypassing U.S. screening, but of recruiting and radicalizing Muslim migrants after their entry to the United States. The recruitment of terrorists in the U.S. is not limited to adult migrants, but to their young children and to their U.S.-born children - which is why family immigration history is necessary to understand the nature of the threat.

In the first 11 months of this year, we have already identified 12 individuals brought into the country as refugees who have been subsequently implicated in terrorism. Their countries of origin range from Bosnia, to Somalia, to Uzbekistan. These events do not occur in isolation, but tend to be part of broader networks of radicalization and extremism that must be understood as we develop immigration policy.

Congress is days away from consideration of an omnibus year-end funding bill that would set the U.S. on an autopilot path to approve green cards, asylee, and refugee status to approximately 170,000 migrants from Muslim countries during the next year. In addition to that would be tens of thousands of temporary visas for entry and employment, and the entire sum is added to the rest of the annual autopilot green card, asylee, refugee, and foreign worker flow. The security task involved is immense, and Congress must have the requested information if lawmakers are to act as responsible stewards of American immigration policy.

We appreciate your prompt attention to this matter. Please contact our staffs if you have any questions regarding this request.

Very truly yours,

Jeff Sessions

United States Senator

Ted Cruz

United States Senator"

The Associated Press contributed to this report.