MADRID (MarketWatch) -- Bitcoin prices fell on Friday after exchange Mt. Gox said it was halting withdrawals temporarily. The company said an increase in flow of withdrawals requests "has hindered our efforts on a technical level. To understand the issue thoroughly, the system needs to be in a static state," said Mt. Gox officials in a note on the website Friday. To resolve the issue, it said a temporarily pause on all withdrawal requests was needed. Its tech team was working on its system, Mt. Gox added, and an update will be provided by Monday. The price of a bitcoin last traded at $719.44, with a session high of $867.60 and a low of $651.70.