How thieves broke into Hatton Garden vault. BBC
because the Broke in is a phrasal verb, Shouldn't we say:
How thieves broke in to Hatton Garden vault.
Update:
An example on broke in to:
Daniel Wallace, 33, and Kacey Adams, 34, broke in to their home in London Road, Halstead, in April 2016. BBC
Best Answer
Break into something
Then he broke into a run and we just couldn't catch him. Onishi broke into sobs and covered his eyes with a handkerchief.
His apartment has been broken into twice, even though he had good locks on the door.
Break into idiom