mysql> CREATE TABLE `mepa_inews` (`id` tinyint unsigned NOT NULL auto_increment, PRIMARY KEY (`id`)) ENGINE=InnoDB DEFAULT CHARSET=utf8;
Query OK, 0 rows affected (0.67 sec)

mysql> INSERT INTO mepa_inews VALUES(''),(''),(''),(''),(''),(''),(''),(''),(''),(''),(''),(''),(''),(''),('');
Query OK, 15 rows affected, 15 warnings (0.01 sec)
Records: 15  Duplicates: 0  Warnings: 0

mysql> SELECT * FROM mepa_inews;
+----+
| id |
+----+
|  1 | 
|  2 | 
|  3 | 
|  4 | 
|  5 | 
|  6 | 
|  7 | 
|  8 | 
|  9 | 
| 10 | 
| 11 | 
| 12 | 
| 13 | 
| 14 | 
| 15 | 
+----+
15 rows in set (0.00 sec)

mysql> DELETE FROM mepa_inews ORDER BY id DESC LIMIT 5;
Query OK, 5 rows affected (0.02 sec)

mysql> SELECT * FROM mepa_inews;
+----+
| id |
+----+
|  1 | 
|  2 | 
|  3 | 
|  4 | 
|  5 | 
|  6 | 
|  7 | 
|  8 | 
|  9 | 
| 10 | 
+----+
10 rows in set (0.00 sec)

mysql> DELETE FROM mepa_inews ORDER BY id ASC LIMIT 5;
Query OK, 5 rows affected (0.00 sec)

mysql> SELECT * FROM mepa_inews;
+----+
| id |
+----+
|  6 | 
|  7 | 
|  8 | 
|  9 | 
| 10 | 
+----+
5 rows in set (0.00 sec)