"Lynn has undergone an MRI scan on his left-shoulder. Reports are awaited. We will get to know in a day or two," a source from the franchise said. Azam, Ali lead Pakistan to victory over West Indies
The Australian suffered the injury during Sunday's match against the Rohit Sharma-captained side, which KKR lost by four wickets at the Wankhede Stadium in Mumbai.
In what is the third injury to the same shoulder in less than two years, Lynn clutched the joint in obvious pain after attempting to claim an outfield catch to dismiss Jos Buttler.
He was attended to by Knight Riders' physio Andrew Leipus and was later seen with an ice pack strapped to his shoulder.
Following the match, Lynn tweeted: "Dear Cricket Gods, did I do something wrong?"
This fuelled speculations that he may be out of action for the entire duration of the IPL.
Lynn, who blasted an unbeaten 93 in KKR's victorious opening match against Gujarat Lions, followed with a rapid 32 when the Gautam Gambhir-led side batted first against Mumbai.