Canada's AltaGas says in potential deal talks

(Reuters) - Canadian energy infrastructure company AltaGas Ltd said on Thursday it was in talks with a third party over a potential transaction. AltaGas did not name the company, but the Wall Street Journal, citing people familiar with the matter, said the firm was is in talks to merge with WGL Holdings Inc , the parent of natural-gas utility Washington Gas. AltaGas's shares ended down 1.3 percent at C$33.65.