Oil prices trended lower on Tuesday following the previous session's sharp gains as the market remained cautious about progress in US-Iran peace talks. US President Donald Trump said on Monday talks with Iran were ongoing, while Tasnim news agency reported earlier that Tehran had suspended indirect negotiations with Washington. Brent crude futures lost 75 cents, or 0.79%, to $94.23 a barrel at 0434 GMT, while US West Texas Intermediate fell 85 cents, or 0.92%, to $91.31 a barrel.