New York attack: What do we know about Akayed Ullah?

What do we know about the man suspected of trying to bomb New York City's main bus terminal?
The suspected bomber was 27-year-old Akayed Ullah, according to New York City Police Commissioner James O'Neill.
Mr O'Neill said he was wearing an "improvised, low-tech, explosive device attached to his body", which he detonated intentionally.
The bomber suffered burns and other wounds and was taken to Bellevue Hospital in Manhattan.
Attacker targets Manhattan bus terminal
New York police respond to explosion
Ullah came from Chittagong, Bangladesh and entered the US with his parents and siblings in February 2011 on an immigrant visa, according to CBS News.
He became a permanent US resident, living in Brooklyn, New York City. Bangladeshi police said he last visited the country on 8 September.
Law enforcement officials in the US told the Associated Press that Ullah was inspired by the Islamic State group - but had not had direct contact with them.
Mr O'Neill said Ullah "did make statements but we're not going to talk about that right now".