Federal officials said on Friday that up to four more people may be dead in the Connecticut plane crash blamed for the deaths of two children, NBC News reported.

"The plane struck two houses," National Transportation Safety Board (NTSB) investigator Robert Gretz said at a press conference. "One of the houses was struck more severely, and part of the plane is actually in the basement."

Gretz also said preliminary reports indicated the plane, registered to Bill Henningsgaard, a Washington state resident, did not send out a distress call prior to crashing on the East Haven, Connecticut residences. NBC reported that Henningsgaard was flying into nearby New Haven to take his son, Max, on a tour of colleges in the region.

Officials said Henningsgaard was trying to make a second attempt to land at the Tweed-New Haven airport when the plane went down, after not being able to land earlier for unknown reasons.

NBC also reported that one of the homes hit by the plane was vacant, while a 13-year-old boy and his 1-year-old brother in the other home did not escape. Their mother survived. The names of the victims were not released.

"We haven't recovered anybody at this point and we presume there is going to be a very bad outcome," East Haven Fire Chief Doug Jackson told NBC.

Watch NBC News' report on the crash, aired Friday, below.

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