By Reuters Staff (Adds CEO comment on provisions) PARIS, May 6 (Reuters) - French investment bank Natixis on Thursday posted a first quarter net profit of 225 million euros, recovering from a loss a year ago, but expressed caution on pandemic-related provisions for bad loans. Despite a drop in the cost of risk in the first three months of the year, the lender said provisions were still at elevated levels with impairments coming from the tourism and aviation sectors. “We must remain cautious regarding the cost of risk,” CEO Nicolas Namias told reporters, as companies hit by the pandemic crisis could still need further support from banks in post-COVID-19 economic recovery.