On Saturday, MoneyGram revealed on social media that a network outage was disrupting several of its systems. By Monday, the company acknowledged it was dealing with a cybersecurity breach affecting certain systems.

MoneyGram, the world’s second-largest money transfer service, serves over 50 million customers and processes more than $200 billion in transfers annually. In response to the breach, the company took some of its systems offline and brought in external cybersecurity experts while coordinating with law enforcement to investigate.

On Tuesday, MoneyGram provided an update, stating they were steadily restoring critical transactional systems. Their team is working around the clock to resume normal operations. However, the company hasn’t given a specific timeline for when services will fully return, only assuring that pending transactions will be available once all systems are back online.