text: Abbas, clear favourite to succeed Arafat, escapes from Gaza &lt;b&gt;...&lt;/b&gt; GAZA CITY, Nov 14 (AFP) - Gunmen killed two members of the security services in Gaza City Sunday as PLO chairman Mahmud Abbas visited a mourning tent for Yasser Arafat, underlining fears the Palestinian leader #39;s death could trigger an upsurge in 