The FBI released two pictures of the two suspects in the Boston Marathon Bombing and a surveillance video on Thursday.

The FBI developed two suspects on Tuesday, according to Special Agent Richard DesLauriers. The FBI is seeking cooperation from the public to provide any information that would be helpful to solve the case, however it warns that the men could be armed and dangerous.

FBI still has not confirmed whether the terror attacks were from domestic or foreign terrorists.

A memorial service for victims of the bombing was held this morning at the Cathedral of the Holy Cross in Boston. The interfaith memorial started at 11a.m. ET and President Obama along with his wife Michelle were in attendance.

President Obama addressed the nation in a press conference immediately after the attacks, saying: "We will find out who did this; we'll find out why they did this," said the president from the White House. "Any responsible individuals, any respon­sible groups will feel the full weight of justice."

Innocent victims 8-year-old Martin Richards, 29-year-old Krystle M. Campbell, and Boston University grad student Lu Lingzi lost their lives in the horrific bombings. 17 of those injured remain in critical condition.

Two bombs went off almost simultaneously 4 hours and 10 minutes into the race. The aftermath of the bomb was the scene of warfare, as blood and limbs were scattered everywhere.

Despite video footage, no suspect has been arrested or identified as of yet.

Watch the video released by the FBI today: