Boston bombing suspects planned to attack Times Square

Surviving Boston Marathon bombing suspect Dzhokhar Tsarnaev told investigators he and his brother had planned to detonate the rest of their explosives in New York's Times Square.

Tsarnaev initially told authorities they planned to go to New York to party after the Boston attack, but following further questioning, he admitted they had discussed a second bombing, this time in Times Square.

The suspect told investigators he and his brother's original plan when they hijacked a car and its driver in Boston was to drive to New York with seven bombs to set them off, but that it was interrupted when the driver escaped and called police, leading to a shootout.

The man who was carjacked told authorities that he heard one of the brothers say "Manhattan" before he escaped, but police have cautioned that it could have been a language mixup, as the suspects were speaking in a Russian dialect at the time.

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Officials noted that the idea was not well developed, and one senior official called the plan "aspirational at most."

New York Mayor Michael Bloomberg and Police Commissioner Ray Kelly scheduled a press briefing about the new information later Thursday.

Tsarnaev's questioning happened before he was read his rights as the US government had invoked an exception to the requirement that all suspects be read their Miranda rights before questioning, which applies in cases of public danger.