Not only was Brad Pitt "blindsided" by estranged wife Angelina Jolie's divorce filing (and blocked from calling her!) but he hasn't seen their kids since she filed for divorce on September 19.

An insider told Us Weekly, "He knows the severity of the allegations and wants to be cleared of abuse before he sees them. He is confident he will be cleared. The kids are asking to see Brad, so he is hoping to see them next week." Another source added, "He's so torn up and shattered, not only because of the divorce but because he hasn't seen the kids and he really wants to. Being apart from them is part of why he's so torn up."

Pitt is currently under investigation by the FBI for alleged child abuse, and though an altercation did take place on the family's private jet on September 14, numerous sources close to the star back him up and say that he didn't strike or hurt Maddox during the confrontation. Clearly Jolie has a different side to her story, because when she released a statement following the split, she said the "decision was made for the health of the family."

Jolie is seeking sole physical custody of Maddox, 15, Pax, 12, Zahara, 11, Shiloh, 10, and twins Knox and Vivienne, 8. She's holed up with them (plus her assistant and bodyguards) at a Malibu rental, and we haven't seen her or Brad in over a week.