UPDATE 1-BP says has financial strength to deal with spill

* Says unaware of justification for share fall Wednesday

* Cost of response effort to date around $1.43 billion

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LONDON, June 10 (Reuters) - Oil giant BP (BP.L) said it had the financial flexibility to deal with liabilities related to its oil spill in the Gulf of Mexico, and that it was unaware of any justification for the collapse in its shares on Wednesday.

"BP faces this situation as a strong company," the company said in a statement.

The cost of the response effort to date has been around $1.43 billion, the company added.

BP's New York-listed American Deposit Receipts fell around 15 percent on Wednesday. (Reporting by Tom Bergin; Editing by Hans Peters)