https://steemd.com/@sgtreport

Steemd shows the most recent activity on your account. You can scroll down a bit to see that @engagement flagged you first and then other accounts did at almost the same time.
The other accounts likely have bots set up on them following whatever engagement does.
Also, if you go and click on the down-arrow beside the number of votes that you have, you will see the highest steem power vote at the top. The very first is engagement and it has a '-' beside it, which means a downvote/flag.
Two of the other '-' flags show up as well, since they are high steem power. The last flags don't show up because they are low on steem power.