sql syntax

I have the following sql to select a number of records. I get a total of 280

SELECT  *
FROM    Activities a
        INNER JOIN Cases AS b ON a.CaseId = b.Id
        INNER JOIN Atts AS d ON d.CaseId = b.Id
        LEFT JOIN Users AS c ON a.responsible = c.UserId
        INNER JOIN Users AS e ON b.AlienId = e.UserId
WHERE   a.FirmId = 9
        AND ( a.ActType = 'TASK'
              OR a.ActType = 'DEADLINE'
            )
        AND a.Complete = '0'
        AND a.DateInitiated < LEFT(DATEADD(DAY, 0, GETDATE()), 12)
        AND b.Archived <> 1
        AND c.UserId is null
ORDER BY c.MailStr ASC;

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I now want to delete them so I tried

DELETE
FROM    Activities a
        INNER JOIN Cases AS b ON a.CaseId = b.Id
        INNER JOIN Atts AS d ON d.CaseId = b.Id
        LEFT JOIN Users AS c ON a.responsible = c.UserId
        INNER JOIN Users AS e ON b.AlienId = e.UserId
WHERE   a.FirmId = 9
        AND ( a.ActType = 'TASK'
              OR a.ActType = 'DEADLINE'
            )
        AND a.Complete = '0'
        AND a.DateInitiated < LEFT(DATEADD(DAY, 0, GETDATE()), 12)
        AND b.Archived <> 1
        AND c.UserId is null

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But i get this error

Msg 102, Level 15, State 1, Line 2
Incorrect syntax near 'a'.

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