The phrase "again announced that" is correct and usable in written English.
It can be used when referring to a previous announcement that is being reiterated or repeated.
Example: "The company again announced that it would be expanding its operations to new markets next year."
Alternatives: "reiterated that" or "further stated that".
On Monday Mr. Mikhalevich, fearing that he would be jailed again, announced that he had fled the country.
On the public address the woman again announced that there would be a delay for a couple of hours.
Their hopes were once more sabotaged by Chambord, who again announced that he would return only on his own terms and under the fleur-de-lis flag of the old regime.
Moving on to the Sun, James Delingpole (again) announced that our paper would "scotch the myth that man-made carbon dioxide (CO2) is causing the planet to warm at such dangerous and unprecedented speeds that only massive government intervention can save us". Note the careful wording.
Amazon has again announced that it will start selling US-produced wine to its American customers by the beginning of October.
That climb looks likely to continue as, today, OPEC yet again announced that it is weighing oil production cuts (though slowing demand due to the global economic crisis could mitigate severe price increases).
Twenty years after Walter Mondale asked "Where's the beef?," Elizabeth Edwards plugged it again, announcing that she and her husband would once again celebrate their anniversary there today.
"The people of Iran shall once again announce that they don't approve of those who only called for executions and jail throughout the last thirty-eight years".
On Saturday people involved with the Pirate Bay did this again, announcing that the group is releasing a free Web browser, called PirateBrowser, that will allow people in countries where the Pirate Bay is currently blocked to still reach its hundreds of thousands of illegal torrent files.
Today the troubled copier maker was heard from yet again, announcing that its fourth-quarter loss would be wider than expected and that it has exhausted its $7 billion line of credit.
And a day after confirming the watch's disappointments, the company is talking product again, announcing that the Adidas-branded version of the smartwatch is ready to launch — news it no doubt hopes will add a bit of a spring to the Ionic's step.
