The retailer reported sales growth, especially in its e-commerce division, but also cautioned about economic uncertainty in the quarters ahead.

Walmart will have to start raising prices later this month due to the high cost of tariffs, executives said on Thursday, even as the retailing giant's U.S. comparable sales surpassed expectations in the first quarter.

Volley after volley of tariffs — and at times on-again, off-again trade actions — have put companies around the world on edge