Count of MERGE INTO UPDATE

Hi, I'm using MERGE INTO with UPDATE on top of ICEBERG. For example MERGE INTO accounts t USING monthly_accounts_update s ON (t.customer = s.customer) WHEN MATCHED THEN UPDATE SET purchases = s.purchases + t.purchases

I would like to know how many records were updated during this query. I see query result doesn't return this number.

Any option to get the number of updated rows?

Thank you