After days of global outrage over the carnage in Daraya, intense violence in Syria's civil war was focused Tuesday in a city farther north, opposition activists said.

Here are the latest key developments in the nearly 18-month crisis:

On the ground: Fierce shelling strikes Demonstration Square

At least 23 people were killed Tuesday in Kafr Nabl, where an aerial attack was launched on Demonstration Square, opposition activists said.

Protesters in the city, in the northwestern province of Idlib, are known for unusual and creative anti-regime slogans and signs.

A graphic video posted online purportedly shows the aftermath of the attacks on Kafr Nabl. Vehicles engulfed in flames spew plumes of thick black smoke as bloody bodies are hurried away on crude stretchers or in the back of a pickup truck.

CNN cannot verify the authenticity of the video.

Across the country, at least 140 people were killed in fresh violence Tuesday, the opposition Local Coordination Committees of Syria said, including 54 in Damascus and its suburbs.

Twelve people were killed and 48 injured when a car bomb exploded during a funeral in Jaramana, in the Damascus countryside, according to the state-run Syrian Arab News Agency. The Syrian Observatory for Human Rights, an opposition group, said the funeral was for two regime supporters killed Monday.

Jaramana, a predominately Christian town, is known for housing many Iraqi refugees.

Government reports gains in Aleppo

Syrian authorities "inflicted heavy losses upon the mercenary terrorists" in the major battleground city of Aleppo, SANA reported Tuesday.

Regime forces and their allies have been fighting rebels -- whom the government calls "terrorists" -- for control of Syria's largest city for weeks.

Report about life after al-Assad

No one can say for sure if or when President Bashar al-Assad's regime will fall. But a report with recommendations on a post-Assad Syria was released Tuesday.

The U.S. Institute of Peace and the Germany Institute for International Security Affairs have produced "The Day After Project: Supporting a Democratic Transition in Syria."

The effort includes Syrians across the spectrum of the opposition, including senior members of the Syrian National Council and the Local Coordination Committees of Syria; former generals, economists and lawyers; and representatives from the Syrian diaspora.

The project was a year in the making, Rafif Jouejati, an LCC spokeswoman, said on Twitter. It contains recommendations that Syrians can "accept, reject or restate," she said.

Among the suggestions: Writing a new constitution, establishing stability and putting together a special tribunal to try regime members, Jouejati said.

The peace institute facilitated the Iraq Study Group report, which made recommendations in 2006 on ending the war there.

Appeal for release of cameraman

A Turkish cameraman has been taken captive in Syria, the Committee to Protect Journalists said.

The group appealed for the immediate release of Cuneyt Unal, who appeared bruised and exhausted in a video aired Tuesday. He's been missing since August 20.

Unal was working in Syria for the U.S. government-funded broadcaster Al-Hurra. His co-worker Bashar Fahmi, a Palestinian reporter, is also missing.

Unal doesn't specify in the video who is holding him, the CPJ says, but talks of an armed group that has clashed with Syrian soldiers. The CPJ says it is holding Syrian authorities responsible for his well-being.