Subway service was shut down on most of Line 4 and a stretch of Sheppard Avenue East was closed down early Saturday as police investigated a suspicious package.

The incident began shortly before 7 a.m.

The TTC said service was suspended between Don Mills Station and Bayview stations due to a “security-related incident” at Don Mills Station at around 6:55 a.m.

Police later said that Sheppard Avenue was closed from Don Mills Road to Parkway Forest Drive as officers investigated a suspicious package.

By around 8:30 a.m., police said the incident had cleared. Subway service has since resumed and the road has reopened.

Police did not say what the package was.

No injuries were reported.