DECLARE @TableName sysname
SET @TableName = 'dbo.tableName'
SELECT u.[name] AS UserName , l.[Begin Time] AS TransactionStartTime
FROM fn_dblog(NULL, NULL) l
INNER JOIN ( SELECT [Transaction ID] FROM fn_dblog(NULL, NULL) WHERE AllocUnitName LIKE @TableName + '%' AND Operation = 'LOP_DELETE_ROWS' ) deletes
ON deletes.[Transaction ID] = l.[Transaction ID]
INNER JOIN sysusers u
ON u.[sid] = l.[Transaction SID]